diff --git a/pom.xml b/pom.xml
index a007f03..5cb84a8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,6 +45,13 @@
             <scope>provided</scope>
         </dependency>
 
+        <dependency>
+            <groupId>net.dmulloy2</groupId>
+            <artifactId>ProtocolLib</artifactId>
+            <version>5.4.0</version>
+            <scope>provided</scope>
+        </dependency>
+
         <dependency>
             <groupId>su.nightexpress.nightcore</groupId>
             <artifactId>NightCore</artifactId>
diff --git a/src/main/java/com/yourname/sellplugin/SellPlugin.java b/src/main/java/com/yourname/sellplugin/SellPlugin.java
index 5762d2d..e766b20 100644
--- a/src/main/java/com/yourname/sellplugin/SellPlugin.java
+++ b/src/main/java/com/yourname/sellplugin/SellPlugin.java
@@ -2,9 +2,11 @@
 
 import com.yourname.sellplugin.command.SellAllCommand;
 import com.yourname.sellplugin.command.SellCommand;
+import com.yourname.sellplugin.command.FastSellAllCommand;
 import com.yourname.sellplugin.command.TopSellCommand;
 import com.yourname.sellplugin.economy.EconomyManager;
 import com.yourname.sellplugin.gui.GUIListener;
+import com.yourname.sellplugin.listener.WorthPacketListener;
 import com.yourname.sellplugin.manager.ConfigManager;
 import com.yourname.sellplugin.manager.DailyBonusManager;
 import com.yourname.sellplugin.manager.MultiplierManager;
@@ -20,6 +22,7 @@ public class SellPlugin extends JavaPlugin {
     private MultiplierManager multiplierManager;
     private DailyBonusManager dailyBonusManager;
     private SellManager sellManager;
+    private WorthPacketListener worthPacketListener;
 
     @Override
     public void onEnable() {
@@ -42,9 +45,13 @@ public void onEnable() {
 
         getCommand("sell").setExecutor(new SellCommand(this));
         getCommand("sellall").setExecutor(new SellAllCommand(this));
+        getCommand("fastsellall").setExecutor(new FastSellAllCommand(this));
         getCommand("topsell").setExecutor(new TopSellCommand(this));
         getServer().getPluginManager().registerEvents(new GUIListener(this), this);
 
+        worthPacketListener = new WorthPacketListener(this);
+        worthPacketListener.register();
+
         getLogger().info("SellPlugin has been enabled successfully.");
     }
 
@@ -53,6 +60,9 @@ public void onDisable() {
         if (multiplierManager != null) {
             multiplierManager.saveAll();
         }
+        if (worthPacketListener != null) {
+            worthPacketListener.unregister();
+        }
         getLogger().info("SellPlugin has been disabled.");
     }
 
diff --git a/src/main/java/com/yourname/sellplugin/command/FastSellAllCommand.java b/src/main/java/com/yourname/sellplugin/command/FastSellAllCommand.java
new file mode 100644
index 0000000..592fe25
--- /dev/null
+++ b/src/main/java/com/yourname/sellplugin/command/FastSellAllCommand.java
@@ -0,0 +1,32 @@
+package com.yourname.sellplugin.command;
+
+import com.yourname.sellplugin.SellPlugin;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class FastSellAllCommand implements CommandExecutor {
+
+    private final SellPlugin plugin;
+
+    public FastSellAllCommand(SellPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player player)) {
+            sender.sendMessage("Only players can use this command.");
+            return true;
+        }
+
+        if (!player.hasPermission("sellplugin.use")) {
+            player.sendMessage(plugin.getConfigManager().getMessage("no-permission"));
+            return true;
+        }
+
+        plugin.getSellManager().sellAll(player);
+        return true;
+    }
+}
diff --git a/src/main/java/com/yourname/sellplugin/gui/CategoryItemsGUI.java b/src/main/java/com/yourname/sellplugin/gui/CategoryItemsGUI.java
index d4dc68e..a1c1848 100644
--- a/src/main/java/com/yourname/sellplugin/gui/CategoryItemsGUI.java
+++ b/src/main/java/com/yourname/sellplugin/gui/CategoryItemsGUI.java
@@ -3,6 +3,7 @@
 import com.yourname.sellplugin.SellPlugin;
 import com.yourname.sellplugin.manager.ConfigManager;
 import com.yourname.sellplugin.manager.PriceManager;
+import com.yourname.sellplugin.util.ItemNameFormatter;
 import com.yourname.sellplugin.util.NumberFormatter;
 import com.yourname.sellplugin.util.SmallCaps;
 import org.bukkit.Bukkit;
@@ -141,7 +142,7 @@ private void populate() {
         int catCount    = plugin.getSellManager().countCategoryItems(player, categoryId);
         List<String> sellLore = new ArrayList<>();
         sellLore.add(ChatColor.GRAY + " ▸ " + SmallCaps.convert("category: ")
-                + ChatColor.WHITE + categoryId);
+                + ChatColor.WHITE + ChatColor.stripColor(cfg.getCategoryDisplayName(categoryId)));
         if (catCount > 0) {
             sellLore.add(ChatColor.GRAY + " ▸ " + SmallCaps.convert("items: ")
                     + ChatColor.WHITE + NumberFormatter.format(catCount));
@@ -161,10 +162,11 @@ private void populate() {
     private ItemStack buildItemDisplay(String itemKey) {
         PriceManager pm = plugin.getPriceManager();
         double base = pm.getPrice(itemKey);
-        double earned = plugin.getMultiplierManager().getMultiplier(player, categoryId);
-        double daily  = plugin.getDailyBonusManager().getDailyBonus(categoryId);
-        double mult   = earned + daily;
-        double effective = base * mult;
+        String itemCategory = pm.getCategory(itemKey);
+        double earned = plugin.getMultiplierManager().getMultiplier(player, itemCategory);
+        double daily  = plugin.getDailyBonusManager().getDailyBonus(itemCategory);
+        double effectiveMultiplier = plugin.getMultiplierManager().getEffectiveMultiplier(player, itemCategory);
+        double effective = base * effectiveMultiplier;
 
         // Build correct ItemStack (handles potions with PotionMeta)
         ItemStack item = resolveItemStack(itemKey);
@@ -179,13 +181,13 @@ private ItemStack buildItemDisplay(String itemKey) {
                     + ChatColor.GOLD + " (+" + String.format("%.2fx", daily) + " today)");
         } else {
             lore.add(ChatColor.GRAY + " ▸ " + ChatColor.WHITE + "Mult:  "
-                    + ChatColor.AQUA + String.format("%.2fx", mult));
+                    + ChatColor.AQUA + String.format("%.2fx", effectiveMultiplier));
         }
         lore.add(ChatColor.GRAY + " ▸ " + ChatColor.WHITE + "Price: "
                 + ChatColor.GREEN + "$" + NumberFormatter.format(effective));
         lore.add(ChatColor.DARK_GRAY + "━━━━━━━━━━━━━━━━━━━━━");
 
-        String displayName = ChatColor.WHITE + formatItemName(itemKey);
+        String displayName = ChatColor.WHITE + ItemNameFormatter.formatKey(itemKey);
 
         ItemMeta meta = item.getItemMeta();
         if (meta != null) {
@@ -224,10 +226,6 @@ private ItemStack resolveItemStack(String itemKey) {
         return new ItemStack(mat != null ? mat : Material.BARRIER);
     }
 
-    private String formatItemName(String key) {
-        return key.replace("_", " ").replace(":", " – ");
-    }
-
     // ── Item clicked ─────────────────────────────────────────────────────────
 
     /**
@@ -286,4 +284,3 @@ public int getPage() {
         return page;
     }
 }
-
diff --git a/src/main/java/com/yourname/sellplugin/gui/ConfirmSellGUI.java b/src/main/java/com/yourname/sellplugin/gui/ConfirmSellGUI.java
index 4e3cdad..e1e4da9 100644
--- a/src/main/java/com/yourname/sellplugin/gui/ConfirmSellGUI.java
+++ b/src/main/java/com/yourname/sellplugin/gui/ConfirmSellGUI.java
@@ -31,10 +31,12 @@ public class ConfirmSellGUI implements InventoryHolder {
     private final Inventory inv;
     private final SellPlugin plugin;
     private final String categoryId;
+    private final int returnPage;
 
-    public ConfirmSellGUI(SellPlugin plugin, Player player, String categoryId) {
+    public ConfirmSellGUI(SellPlugin plugin, Player player, String categoryId, int returnPage) {
         this.plugin = plugin;
         this.categoryId = categoryId;
+        this.returnPage = returnPage;
 
         ConfigManager cfg = plugin.getConfigManager();
         String title = ChatColor.DARK_GRAY + "" + ChatColor.BOLD
@@ -113,5 +115,8 @@ public void open(Player p) {
     public String getCategoryId() {
         return categoryId;
     }
-}
 
+    public int getReturnPage() {
+        return returnPage;
+    }
+}
diff --git a/src/main/java/com/yourname/sellplugin/gui/GUIListener.java b/src/main/java/com/yourname/sellplugin/gui/GUIListener.java
index 2b24944..bd86855 100644
--- a/src/main/java/com/yourname/sellplugin/gui/GUIListener.java
+++ b/src/main/java/com/yourname/sellplugin/gui/GUIListener.java
@@ -81,7 +81,7 @@ public void onClick(InventoryClickEvent e) {
                     e.setCancelled(true);
                     String catId = shopGUI.getCategoryAtSlot(slot);
                     if (catId != null) {
-                        new CategoryProgressGUI(plugin, player, catId).open(player);
+                        new CategoryItemsGUI(plugin, player, catId, 0).open(player);
                     }
                     return;
                 }
@@ -130,7 +130,7 @@ public void onClick(InventoryClickEvent e) {
             }
 
             if (slot == ConfirmSellGUI.SLOT_CANCEL) {
-                new CategoryProgressGUI(plugin, player, confirmGUI.getCategoryId()).open(player);
+                new CategoryItemsGUI(plugin, player, confirmGUI.getCategoryId(), confirmGUI.getReturnPage()).open(player);
                 return;
             }
             return;
@@ -145,7 +145,7 @@ public void onClick(InventoryClickEvent e) {
             int slot = e.getSlot();
 
             if (slot == CategoryItemsGUI.SLOT_BACK) {
-                new CategoryProgressGUI(plugin, player, catItemsGUI.getCategoryId()).open(player);
+                new ShopMainGUI(plugin, player).open(player);
                 return;
             }
 
@@ -160,8 +160,7 @@ public void onClick(InventoryClickEvent e) {
             }
 
             if (slot == CategoryItemsGUI.SLOT_SELL_ALL) {
-                player.closeInventory();
-                plugin.getSellManager().sellCategory(player, catItemsGUI.getCategoryId());
+                new ConfirmSellGUI(plugin, player, catItemsGUI.getCategoryId(), catItemsGUI.getPage()).open(player);
                 return;
             }
 
@@ -307,4 +306,3 @@ private void returnItem(Player player, ItemStack item) {
         }
     }
 }
-
diff --git a/src/main/java/com/yourname/sellplugin/gui/ShopMainGUI.java b/src/main/java/com/yourname/sellplugin/gui/ShopMainGUI.java
index f800808..79c6576 100644
--- a/src/main/java/com/yourname/sellplugin/gui/ShopMainGUI.java
+++ b/src/main/java/com/yourname/sellplugin/gui/ShopMainGUI.java
@@ -80,7 +80,7 @@ private ItemStack buildCategoryButton(String catId) {
                     + ChatColor.YELLOW + "+" + String.format("%.2f", dailyBonus) + "x");
         }
         lore.add(ChatColor.DARK_GRAY + "━━━━━━━━━━━━━━━━━━━");
-        lore.add(ChatColor.YELLOW + " ✦ " + SmallCaps.convert("click to view progress!"));
+        lore.add(ChatColor.YELLOW + " ✦ " + SmallCaps.convert("click to view items & prices!"));
 
         List<String> extraLore = cfg.getCategoryLore(catId);
         if (!extraLore.isEmpty()) lore.addAll(extraLore);
diff --git a/src/main/java/com/yourname/sellplugin/listener/WorthPacketListener.java b/src/main/java/com/yourname/sellplugin/listener/WorthPacketListener.java
new file mode 100644
index 0000000..dbf8c71
--- /dev/null
+++ b/src/main/java/com/yourname/sellplugin/listener/WorthPacketListener.java
@@ -0,0 +1,147 @@
+package com.yourname.sellplugin.listener;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.ProtocolManager;
+import com.comphenix.protocol.events.ListenerPriority;
+import com.comphenix.protocol.events.PacketAdapter;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.events.PacketListener;
+import com.yourname.sellplugin.SellPlugin;
+import com.yourname.sellplugin.gui.CategoryItemsGUI;
+import com.yourname.sellplugin.gui.CategoryProgressGUI;
+import com.yourname.sellplugin.gui.ConfirmSellAllGUI;
+import com.yourname.sellplugin.gui.ConfirmSellGUI;
+import com.yourname.sellplugin.gui.SellAllGUI;
+import com.yourname.sellplugin.gui.ShopMainGUI;
+import com.yourname.sellplugin.gui.TopSellGUI;
+import com.yourname.sellplugin.util.NumberFormatter;
+import org.bukkit.block.DoubleChest;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.BlockInventoryHolder;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.InventoryHolder;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class WorthPacketListener {
+
+    private final SellPlugin plugin;
+    private PacketListener packetListener;
+
+    public WorthPacketListener(SellPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    public void register() {
+        if (plugin.getServer().getPluginManager().getPlugin("ProtocolLib") == null) {
+            plugin.getLogger().warning("ProtocolLib not found; sell worth tooltips are disabled.");
+            return;
+        }
+
+        ProtocolManager protocolManager = ProtocolLibrary.getProtocolManager();
+        packetListener = new PacketAdapter(plugin, ListenerPriority.NORMAL,
+                PacketType.Play.Server.SET_SLOT,
+                PacketType.Play.Server.WINDOW_ITEMS) {
+
+            @Override
+            public void onPacketSending(PacketEvent event) {
+                if (!WorthPacketListener.this.plugin.getConfigManager().isWorthEnabled()) return;
+                if (!shouldDecorate(event.getPlayer())) return;
+
+                if (event.getPacketType() == PacketType.Play.Server.SET_SLOT) {
+                    if (event.getPacket().getItemModifier().size() <= 0) return;
+                    ItemStack item = event.getPacket().getItemModifier().read(0);
+                    ItemStack updated = addWorthLore(event.getPlayer(), item);
+                    if (updated != item) {
+                        event.getPacket().getItemModifier().write(0, updated);
+                    }
+                    return;
+                }
+
+                if (event.getPacket().getItemListModifier().size() <= 0) return;
+                List<ItemStack> items = event.getPacket().getItemListModifier().read(0);
+                if (items == null || items.isEmpty()) return;
+
+                boolean changed = false;
+                List<ItemStack> updatedItems = new ArrayList<>(items.size());
+                for (ItemStack item : items) {
+                    ItemStack updated = addWorthLore(event.getPlayer(), item);
+                    updatedItems.add(updated);
+                    changed |= updated != item;
+                }
+
+                if (changed) {
+                    event.getPacket().getItemListModifier().write(0, updatedItems);
+                }
+            }
+        };
+        protocolManager.addPacketListener(packetListener);
+    }
+
+    public void unregister() {
+        if (packetListener == null) return;
+        ProtocolLibrary.getProtocolManager().removePacketListener(packetListener);
+        packetListener = null;
+    }
+
+    private ItemStack addWorthLore(Player player, ItemStack original) {
+        if (original == null || original.getType().isAir()) return original;
+
+        double worth = plugin.getSellManager().calculateItemWorth(player, original);
+        if (worth <= 0) return original;
+
+        ItemStack clone = original.clone();
+        ItemMeta meta = clone.getItemMeta();
+        if (meta == null) return original;
+
+        List<String> lore = meta.hasLore() ? new ArrayList<>(meta.getLore()) : new ArrayList<>();
+        if (!lore.isEmpty()) {
+            lore.add("");
+        }
+        lore.add(plugin.getConfigManager().getWorthFormat()
+                .replace("{worth}", NumberFormatter.format(worth)));
+        meta.setLore(lore);
+        clone.setItemMeta(meta);
+        return clone;
+    }
+
+    private boolean shouldDecorate(Player player) {
+        Inventory topInventory = player.getOpenInventory().getTopInventory();
+        InventoryHolder holder = topInventory.getHolder();
+
+        if (isPluginGui(holder)) return false;
+
+        InventoryType type = topInventory.getType();
+        if (type == InventoryType.CRAFTING
+                || type == InventoryType.CREATIVE
+                || type == InventoryType.PLAYER) {
+            return true;
+        }
+
+        if (holder instanceof BlockInventoryHolder || holder instanceof DoubleChest) {
+            return true;
+        }
+
+        return switch (type) {
+            case ANVIL, BEACON, BLAST_FURNACE, BREWING, CARTOGRAPHY, CRAFTER,
+                    ENCHANTING, FURNACE, GRINDSTONE, LOOM, MERCHANT,
+                    SMITHING, SMOKER, STONECUTTER -> true;
+            default -> false;
+        };
+    }
+
+    private boolean isPluginGui(InventoryHolder holder) {
+        return holder instanceof ShopMainGUI
+                || holder instanceof CategoryProgressGUI
+                || holder instanceof CategoryItemsGUI
+                || holder instanceof SellAllGUI
+                || holder instanceof ConfirmSellGUI
+                || holder instanceof ConfirmSellAllGUI
+                || holder instanceof TopSellGUI;
+    }
+}
diff --git a/src/main/java/com/yourname/sellplugin/manager/ConfigManager.java b/src/main/java/com/yourname/sellplugin/manager/ConfigManager.java
index 060d709..b402892 100644
--- a/src/main/java/com/yourname/sellplugin/manager/ConfigManager.java
+++ b/src/main/java/com/yourname/sellplugin/manager/ConfigManager.java
@@ -85,6 +85,14 @@ public Material getFillerBlock() {
         return mat != null ? mat : Material.BLACK_STAINED_GLASS_PANE;
     }
 
+    public boolean isWorthEnabled() {
+        return plugin.getConfig().getBoolean("worth.enabled", true);
+    }
+
+    public String getWorthFormat() {
+        return color(plugin.getConfig().getString("worth.format", "&7Worth &a&l${worth}"));
+    }
+
     // ---- SellAll GUI (simple /sellall GUI) --------------------------------
     public String getSellAllGuiTitle() {
         return color(plugin.getConfig().getString("sell-all-gui.title", "&8&lSell All Items"));
diff --git a/src/main/java/com/yourname/sellplugin/manager/SellManager.java b/src/main/java/com/yourname/sellplugin/manager/SellManager.java
index 70a382c..d7a9a00 100644
--- a/src/main/java/com/yourname/sellplugin/manager/SellManager.java
+++ b/src/main/java/com/yourname/sellplugin/manager/SellManager.java
@@ -221,6 +221,24 @@ public double calculateCategoryValue(Player player, String category) {
         return total;
     }
 
+    public double calculateItemWorth(Player player, ItemStack item) {
+        if (item == null || item.getType() == Material.AIR) return 0.0;
+
+        if (isShulkerBox(item)) {
+            return peekShulkerContents(player, item, null, null).earned;
+        }
+
+        String key = plugin.getPriceManager().getItemKey(item);
+        if (key == null) return 0.0;
+
+        double base = plugin.getPriceManager().getPrice(key);
+        if (base <= 0) return 0.0;
+
+        String category = plugin.getPriceManager().getCategory(key);
+        double multiplier = plugin.getMultiplierManager().getEffectiveMultiplier(player, category);
+        return base * multiplier * item.getAmount();
+    }
+
     // ---------------------------------------------------------------
     // Finalize a sell operation
     // ---------------------------------------------------------------
diff --git a/src/main/java/com/yourname/sellplugin/util/ItemNameFormatter.java b/src/main/java/com/yourname/sellplugin/util/ItemNameFormatter.java
new file mode 100644
index 0000000..fd93919
--- /dev/null
+++ b/src/main/java/com/yourname/sellplugin/util/ItemNameFormatter.java
@@ -0,0 +1,31 @@
+package com.yourname.sellplugin.util;
+
+import java.util.Locale;
+
+public final class ItemNameFormatter {
+
+    private ItemNameFormatter() {
+    }
+
+    public static String formatKey(String key) {
+        if (key == null || key.isBlank()) return "";
+
+        String[] parts = key.split(":", 2);
+        String materialName = formatWords(parts[0]);
+        if (parts.length == 1) return materialName;
+
+        return materialName + " (" + formatWords(parts[1]) + ")";
+    }
+
+    private static String formatWords(String raw) {
+        String[] words = raw.toLowerCase(Locale.ENGLISH).split("[_ ]+");
+        StringBuilder builder = new StringBuilder();
+        for (String word : words) {
+            if (word.isEmpty()) continue;
+            if (!builder.isEmpty()) builder.append(' ');
+            builder.append(Character.toUpperCase(word.charAt(0)));
+            builder.append(word.substring(1));
+        }
+        return builder.toString();
+    }
+}
diff --git a/src/main/resources/config.yml b/src/main/resources/config.yml
index 3af36ce..0016b74 100644
--- a/src/main/resources/config.yml
+++ b/src/main/resources/config.yml
@@ -57,6 +57,13 @@ coinsengine-currency-id: coins
 # Filler block used as background in GUIs (must be a valid Material name)
 filler-block: "BLACK_STAINED_GLASS_PANE"
 
+# ---- Sell worth tooltip -------------------------------------- #
+# Adds a client-side worth line to sellable items using packets.
+# Supports the {worth} placeholder.
+worth:
+  enabled: true
+  format: "&7Worth &a&l${worth}"
+
 # ---- Main Shop GUI (/sell) ---------------------------------- #
 # This opens the 9x5 category browsing menu.
 
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 078d553..9f1829a 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -2,7 +2,7 @@ name: SellPlugin
 version: 2.1.0
 main: com.yourname.sellplugin.SellPlugin
 api-version: 1.13
-softdepend: [Vault, CoinsEngine]
+softdepend: [Vault, CoinsEngine, ProtocolLib]
 
 commands:
   sell:
@@ -14,6 +14,10 @@ commands:
     description: Opens the quick sell-all GUI.
     usage: /sellall
     permission: sellplugin.use
+  fastsellall:
+    description: Instantly sells all sellable items without opening a GUI.
+    usage: /fastsellall
+    permission: sellplugin.use
 
   topsell:
     description: Opens the top sellers leaderboard.