diff --git a/src/main/java/xyz/soukup/ecoCraftCore/commands/ShopCommand.java b/src/main/java/xyz/soukup/ecoCraftCore/commands/ShopCommand.java
index 1fccd48..69e26bd 100644
--- a/src/main/java/xyz/soukup/ecoCraftCore/commands/ShopCommand.java
+++ b/src/main/java/xyz/soukup/ecoCraftCore/commands/ShopCommand.java
@@ -9,7 +9,12 @@ import org.bukkit.Location;
 import org.bukkit.block.Chest;
 import org.bukkit.block.Sign;
 import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
 import xyz.soukup.ecoCraftCore.events.RulerMarking;
+import xyz.soukup.ecoCraftCore.objects.Shop;
+import xyz.soukup.ecoCraftCore.objects.VirtualChest;
+import xyz.soukup.ecoCraftCore.utilities.InventoryUtils;
+import xyz.soukup.ecoCraftCore.utilities.PDC;
 
 public class ShopCommand {
     public static LiteralArgumentBuilder<CommandSourceStack> createCommand() {
@@ -41,15 +46,47 @@ public class ShopCommand {
         Chest chest = RulerMarking.chests.get(player);
         Sign sign = RulerMarking.signs.get(player);
         Integer amount = ctx.getArgument("amount", Integer.class);
-        Float buyPrice = ctx.getArgument("buy_price", Float.class);
-        Float sellPrice = ctx.getArgument("sell_price", Float.class);
+
+        Float buyPrice;
+        try {
+            buyPrice = ctx.getArgument("buy_price", Float.class);
+        } catch (IllegalArgumentException e) {
+            buyPrice = 0F;
+        }
+
+        Float sellPrice;
+        try {
+            sellPrice = ctx.getArgument("sell_price", Float.class);
+        }catch (IllegalArgumentException e){
+            sellPrice = 0F;
+        }
+
+
 
         if (sign == null || chest == null){
             player.sendPlainMessage("nemáš označeno");
             return 0;
         }
 
-        ctx.getSource().getSender().sendPlainMessage("buy");
+        ItemStack item = player.getInventory().getItemInMainHand();
+
+        if (item.isEmpty()){
+            player.sendPlainMessage("nemáš item v ruke");
+            return 0;
+        }
+
+        VirtualChest virtualChest = new VirtualChest(chest);
+        virtualChest.save();
+        PDC.set(chest, "virtual", virtualChest.getId());
+
+        int freeSpace = InventoryUtils.getSpaceLeft(chest.getInventory(), item);
+        int stock = InventoryUtils.getCount(chest.getInventory(), item);
+
+        Shop shop = new Shop(player, item, stock, freeSpace, amount, buyPrice, sellPrice, virtualChest.getId());
+        shop.save();
+        shop.writeIntoSign(sign);
+
+
         return 1;
     }
 
diff --git a/src/main/java/xyz/soukup/ecoCraftCore/objects/Shop.java b/src/main/java/xyz/soukup/ecoCraftCore/objects/Shop.java
index fbe5ef4..89ce960 100644
--- a/src/main/java/xyz/soukup/ecoCraftCore/objects/Shop.java
+++ b/src/main/java/xyz/soukup/ecoCraftCore/objects/Shop.java
@@ -1,19 +1,27 @@
 package xyz.soukup.ecoCraftCore.objects;
 import com.j256.ormlite.field.DatabaseField;
 import com.j256.ormlite.table.DatabaseTable;
+import net.kyori.adventure.text.Component;
+import org.bukkit.block.Sign;
+import org.bukkit.block.TileState;
+import org.bukkit.block.sign.Side;
+import org.bukkit.block.sign.SignSide;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
 import xyz.soukup.ecoCraftCore.utilities.DaoRegistry;
 import xyz.soukup.ecoCraftCore.utilities.JSONConverter;
+import xyz.soukup.ecoCraftCore.utilities.PDC;
 
 import java.sql.SQLException;
 import java.sql.Timestamp;
+import java.util.List;
 
 @DatabaseTable(tableName = "shops")
 public class Shop {
 
     @DatabaseField(generatedId = true)
-    private long id;
+    private int id;
 
     @DatabaseField(canBeNull = false)
     private String owner;
@@ -40,6 +48,8 @@ public class Shop {
     @DatabaseField(canBeNull = false, defaultValue = "0")
     private int stock;
 
+    @DatabaseField(canBeNull = false, defaultValue = "0", columnName = "free_space")
+    private int freeSpace;
 
     @DatabaseField(canBeNull = false)
     private int virtualChestID;
@@ -54,12 +64,13 @@ public class Shop {
 
     }
 
-    public Shop(Player player, ItemStack itemStack, int stock, int amount, float priceBuy, float priceSell, int virtualChestID) {
+    public Shop(Player player, ItemStack itemStack, int stock, int freeSpace, int amount, float priceBuy, float priceSell, int virtualChestID) {
         this.ownerType = "player";
         this.owner = player.getName();
         this.itemStackJson = JSONConverter.itemStackToJson(itemStack);
         this.itemName = itemStack.getType().toString();
         this.stock = stock;
+        this.freeSpace = freeSpace;
         this.amount = amount;
         this.priceBuy = priceBuy;
         this.priceSell = priceSell;
@@ -110,6 +121,35 @@ public class Shop {
         return JSONConverter.itemStackFromJson(this.itemStackJson);
     }
 
+    public void writeIntoSign(Sign sign){
+        PDC.set(sign, "shop", this.id);
+
+        Component prices;
+        Component shopType;
+
+        if (this.priceBuy != 0 && this.priceSell != 0){
+            shopType = Component.text("[ buy / sell ]");
+            prices = Component.text(String.format("%.2fŧ / %.2fŧ", this.priceBuy, this.priceSell));
+        } else if (this.priceBuy != 0) {
+            shopType = Component.text("[ buy ]");
+            prices = Component.text(String.format("%.2fŧ", this.priceBuy));
+        } else {
+            shopType = Component.text("[ sell ]");
+            prices = Component.text(String.format("%.2fŧ", this.priceSell));
+        }
+
+        @NotNull SignSide side = sign.getSide(Side.FRONT);
+
+        side.line(0, Component.text(this.owner));
+        side.line(1, Component.text(this.itemName));
+        side.line(2, shopType);
+        side.line(3, prices);
+
+        sign.update();
+
+
+    }
+
     public long getId() {
         return id;
     }
diff --git a/src/main/java/xyz/soukup/ecoCraftCore/objects/VirtualChest.java b/src/main/java/xyz/soukup/ecoCraftCore/objects/VirtualChest.java
index 08c20e8..b76c443 100644
--- a/src/main/java/xyz/soukup/ecoCraftCore/objects/VirtualChest.java
+++ b/src/main/java/xyz/soukup/ecoCraftCore/objects/VirtualChest.java
@@ -16,7 +16,7 @@ import java.sql.SQLException;
 public class VirtualChest {
 
     @DatabaseField(generatedId = true)
-    private long id;
+    private int id;
 
     @DatabaseField(columnName = "inventory")
     private String inventoryJson;
@@ -66,7 +66,23 @@ public class VirtualChest {
         return this.inventory;
     }
 
+    public int getId() {
+        return id;
+    }
+
+    public Boolean getOpened() {
+        return isOpened;
+    }
 
+    public String getActiveServer() {
+        return activeServer;
+    }
 
+    public void setOpened(Boolean opened) {
+        isOpened = opened;
+    }
 
+    public void setActiveServer(String activeServer) {
+        this.activeServer = activeServer;
+    }
 }