diff --git a/src/main/java/com/alttd/playershops/events/ShopItemAmountChangeEvent.java b/src/main/java/com/alttd/playershops/events/ShopItemAmountChangeEvent.java
new file mode 100644
index 0000000..18bb5aa
--- /dev/null
+++ b/src/main/java/com/alttd/playershops/events/ShopItemAmountChangeEvent.java
@@ -0,0 +1,31 @@
+package com.alttd.playershops.events;
+
+import com.alttd.playershops.shop.PlayerShop;
+import org.bukkit.event.HandlerList;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+public class ShopItemAmountChangeEvent extends ShopEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private final int newAmount;
+
+    public ShopItemAmountChangeEvent(PlayerShop shop, int newAmount) {
+        super(shop);
+        this.newAmount = newAmount;
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public int getNewAmount() {
+        return newAmount;
+    }
+}
diff --git a/src/main/java/com/alttd/playershops/events/ShopItemChangeEvent.java b/src/main/java/com/alttd/playershops/events/ShopItemChangeEvent.java
new file mode 100644
index 0000000..269554f
--- /dev/null
+++ b/src/main/java/com/alttd/playershops/events/ShopItemChangeEvent.java
@@ -0,0 +1,31 @@
+package com.alttd.playershops.events;
+
+import com.alttd.playershops.shop.PlayerShop;
+import org.bukkit.event.HandlerList;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+public class ShopItemChangeEvent extends ShopEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private final ItemStack newItem;
+
+    public ShopItemChangeEvent(PlayerShop shop, ItemStack newItem) {
+        super(shop);
+        this.newItem = newItem;
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public ItemStack getNewItem() {
+        return newItem;
+    }
+}
diff --git a/src/main/java/com/alttd/playershops/events/ShopPriceChangeEvent.java b/src/main/java/com/alttd/playershops/events/ShopPriceChangeEvent.java
new file mode 100644
index 0000000..f4e32ae
--- /dev/null
+++ b/src/main/java/com/alttd/playershops/events/ShopPriceChangeEvent.java
@@ -0,0 +1,31 @@
+package com.alttd.playershops.events;
+
+import com.alttd.playershops.shop.PlayerShop;
+import org.bukkit.event.HandlerList;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+public class ShopPriceChangeEvent extends ShopEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private final double newPrice;
+
+    public ShopPriceChangeEvent(PlayerShop shop, double newPrice) {
+        super(shop);
+        this.newPrice = newPrice;
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public double getNewPrice() {
+        return newPrice;
+    }
+}
diff --git a/src/main/java/com/alttd/playershops/events/ShopTypeChangeEvent.java b/src/main/java/com/alttd/playershops/events/ShopTypeChangeEvent.java
new file mode 100644
index 0000000..2776cf9
--- /dev/null
+++ b/src/main/java/com/alttd/playershops/events/ShopTypeChangeEvent.java
@@ -0,0 +1,31 @@
+package com.alttd.playershops.events;
+
+import com.alttd.playershops.shop.PlayerShop;
+import com.alttd.playershops.shop.ShopType;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+public class ShopTypeChangeEvent extends ShopEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private final ShopType shopType;
+
+    public ShopTypeChangeEvent(PlayerShop shop, ShopType shopType) {
+        super(shop);
+        this.shopType = shopType;
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public ShopType getShopType() {
+        return shopType;
+    }
+}
diff --git a/src/main/java/com/alttd/playershops/shop/PlayerShop.java b/src/main/java/com/alttd/playershops/shop/PlayerShop.java
index 8228f89..c1b9c98 100644
--- a/src/main/java/com/alttd/playershops/shop/PlayerShop.java
+++ b/src/main/java/com/alttd/playershops/shop/PlayerShop.java
@@ -1,7 +1,7 @@
 package com.alttd.playershops.shop;
 
 import com.alttd.playershops.PlayerShops;
-import com.alttd.playershops.events.PlayerExchangeShopEvent;
+import com.alttd.playershops.events.*;
 import com.alttd.playershops.utils.EconomyUtils;
 import com.alttd.playershops.utils.InventoryUtils;
 import com.alttd.playershops.utils.ShopUtil;
@@ -30,7 +30,7 @@ public class PlayerShop {
     private String ownerName;
     @Getter
     private UUID ownerUUID;
-    @Getter @Setter
+    @Getter
     private ShopType type = ShopType.NONE;
     @Getter
     private final Location signLocation;
@@ -38,19 +38,20 @@ public class PlayerShop {
     private final Location shopLocation;
     @Getter
     private String server;
-    @Getter @Setter
+    @Getter
     private double price;
-    @Getter @Setter
+    @Getter
     private int amount;
-    @Getter @Setter
+    @Getter
     private double balance;
-    @Getter @Setter
+    @Getter
     private ItemStack itemStack;
     @Getter @Setter
     private long lastTransaction;
     @Getter @Setter
     private boolean notifiedOwner = false;
-
+    @Getter @Setter
+    private boolean dirty;
 
     public PlayerShop(Location shopLocation, Location signLocation, Player player) {
         this(shopLocation, signLocation, player.getUniqueId(), player.getName());
@@ -65,7 +66,7 @@ public class PlayerShop {
         updateSign();
     }
 
-    public static PlayerShop create(UUID shopID, String ownerName, UUID ownerUUID, ShopType shopType, String server,
+    public static PlayerShop load(UUID shopID, String ownerName, UUID ownerUUID, ShopType shopType, String server,
                                       Location shopLocation, Location signLocation, double price, int amount,
                                       double balance, ItemStack item, long lastTransaction) {
         PlayerShop playerShop = new PlayerShop(shopLocation, signLocation, ownerUUID, ownerName);
@@ -162,12 +163,26 @@ public class PlayerShop {
         return this.getPrice() / this.getAmount();
     }
 
-    public void removeBalance(double amount) {
+    public boolean removeBalance(double amount) {
+        ShopBalanceChangeEvent shopBalanceChangeEvent = new ShopBalanceChangeEvent(this, ShopBalanceChangeEvent.ChangeReason.WIDRAW);
+        if (Util.callCancellableEvent(shopBalanceChangeEvent))
+            return false; // cancelled by another plugin, does this need logging?
+
+        setDirty(true);
+        update();
         this.balance -= amount;
+        return true;
     }
 
-    public void addBalance(double amount) {
+    public boolean addBalance(double amount) {
+        ShopBalanceChangeEvent shopBalanceChangeEvent = new ShopBalanceChangeEvent(this, ShopBalanceChangeEvent.ChangeReason.DEPOSIT);
+        if (Util.callCancellableEvent(shopBalanceChangeEvent))
+            return false; // cancelled by another plugin, does this need logging?
+
+        setDirty(true);
+        update();
         this.balance += amount;
+        return true;
     }
 
 
@@ -209,9 +224,11 @@ public class PlayerShop {
             return TransactionError.CANCELLED;
         }
 
+        if (!addBalance(price))
+            return TransactionError.CANCELLED;
+
         InventoryUtils.removeItem(getInventory(), itemStack);
         EconomyUtils.removeFunds(player, price);
-        addBalance(price);
         InventoryUtils.addItem(player.getInventory(), itemStack);
         player.updateInventory();
 
@@ -247,8 +264,10 @@ public class PlayerShop {
             return TransactionError.CANCELLED;
         }
 
+        if (!removeBalance(price))
+            return TransactionError.CANCELLED;
+
         InventoryUtils.removeItem(player.getInventory(), itemStack);
-        removeBalance(price);
         EconomyUtils.addFunds(player, price);
         InventoryUtils.addItem(getInventory(), itemStack);
         player.updateInventory();
@@ -260,4 +279,51 @@ public class PlayerShop {
         return TransactionError.NONE;
     }
 
+    public void setItemStack(ItemStack itemStack) {
+        ShopItemChangeEvent shopItemChangeEvent = new ShopItemChangeEvent(this, itemStack);
+        if (Util.callCancellableEvent(shopItemChangeEvent))
+            return; // cancelled by another plugin, does this need logging?
+
+        this.itemStack = itemStack;
+        setDirty(true);
+        update();
+    }
+
+    public void setPrice(double price) {
+        ShopPriceChangeEvent shopPriceChangeEvent = new ShopPriceChangeEvent(this, price);
+        if (Util.callCancellableEvent(shopPriceChangeEvent))
+            return; // cancelled by another plugin, does this need logging?
+
+        this.price = price;
+        setDirty(true);
+        update();
+    }
+
+    public void setAmount(int amount) {
+        ShopItemAmountChangeEvent ShopItemAmountChangeEvent = new ShopItemAmountChangeEvent(this, amount);
+        if (Util.callCancellableEvent(ShopItemAmountChangeEvent))
+            return; // cancelled by another plugin, does this need logging?
+
+        this.amount = amount;
+        setDirty(true);
+        update();
+    }
+
+    public void setShopType(ShopType shopType) {
+        ShopTypeChangeEvent shopTypeChangeEvent = new ShopTypeChangeEvent(this, shopType);
+        if (Util.callCancellableEvent(shopTypeChangeEvent))
+            return; // cancelled by another plugin, does this need logging?
+
+        this.type = shopType;
+        setDirty(true);
+        update();
+    }
+
+    /**
+     * Updates and saves the PlayerShop in the database
+     */
+    private void update() {
+
+    }
+
 }