diff --git a/swap_meet/clothing.py b/swap_meet/clothing.py
new file mode 100644
index 000000000..80bbfd3dc
--- /dev/null
+++ b/swap_meet/clothing.py
@@ -0,0 +1,13 @@
+# ----------- WAVE 4 -----------
+from swap_meet.item import Item
+class Clothing(Item):
+    def __init__ (self, condition=0, category ="Clothing"):
+        super().__init__("Clothing", condition)
+        self.category = "Clothing"
+        self.condition = condition
+    
+    def __str__(self):
+        return "The finest clothing you could wear."
+
+
+
diff --git a/swap_meet/decor.py b/swap_meet/decor.py
new file mode 100644
index 000000000..8fc454384
--- /dev/null
+++ b/swap_meet/decor.py
@@ -0,0 +1,11 @@
+
+from swap_meet.item import Item
+
+class Decor(Item):
+    def __init__(self,condition=0, category="Decor"):
+        super().__init__(category)
+        self.category = "Decor"
+        self.condition = condition
+    def __str__(self):
+        return "Something to decorate your space."
+        
\ No newline at end of file
diff --git a/swap_meet/electronics.py b/swap_meet/electronics.py
new file mode 100644
index 000000000..3fe4e6fc4
--- /dev/null
+++ b/swap_meet/electronics.py
@@ -0,0 +1,12 @@
+
+from swap_meet.item import Item
+
+class Electronics(Item): 
+    def __init__(self,condition=0, category="Electronics"):
+        super().__init__(category)
+        self.category = "Electronics"
+        self.condition = condition
+    
+    def __str__(self):
+        return "A gadget full of buttons and secrets."
+    
diff --git a/swap_meet/item.py b/swap_meet/item.py
new file mode 100644
index 000000000..70b0229b7
--- /dev/null
+++ b/swap_meet/item.py
@@ -0,0 +1,23 @@
+# this will be the parent class
+class Item:
+    def __init__(self, condition = 0, category = ""):
+        self.category = category
+        self.condition = condition
+    def __str__(self):
+        return "Hello World!"    
+    
+    
+    def condition_description(self):
+        if self.condition >= 5:
+            return "BRAND NEW - STRAIGHT OUT OF THE BOX"
+        elif self.condition >= 4:
+            return "Looks Brand New" 
+        elif self.condition >= 3:
+            return "A few imperfections - Nobody's Perfect!"
+        elif self.condition >= 1:
+            return "Fairly Used, Easy DIY fix"  
+
+
+
+
+
diff --git a/swap_meet/vendor.py b/swap_meet/vendor.py
new file mode 100644
index 000000000..6bb465a86
--- /dev/null
+++ b/swap_meet/vendor.py
@@ -0,0 +1,100 @@
+from swap_meet.item import Item
+
+# ---------- Wave 1 -----------
+
+class Vendor:
+    def __init__(self, inventory = None):
+        if inventory == None:
+            self.inventory = []
+        else:
+            self.inventory = inventory    
+    
+    def add(self, item):
+        self.inventory.append(item)
+        return item 
+    
+
+    def remove(self,item):
+        if item in self.inventory:
+            self.inventory.remove(item)
+            return item
+        else:
+            return False
+    
+    
+    
+    
+# --------------- Wave 3 --------------   
+    def swap_items(self,friend_vendor,my_item,their_item):  
+        if my_item not in self.inventory or their_item not in friend_vendor.inventory: 
+            return False
+        else: 
+            self.inventory.remove(my_item) 
+            friend_vendor.inventory.append(my_item)
+            friend_vendor.inventory.remove(their_item) 
+            self.inventory.append(their_item)
+            return True    
+
+
+
+
+
+
+# --------------- Wave 2 --------------
+# you need to call the item.py file in order to access the category list 
+# list of items in category list 
+    def get_by_category(self,category):
+        items = []
+        for new_item in self.inventory:
+            if new_item.category == category:
+                items.append(new_item)
+        return items
+
+
+
+
+# ------------- Wave 4 -------------
+
+    def swap_first_item(self,friend_vendor):
+        if len(self.inventory) == 0 or len(friend_vendor.inventory) == 0:
+                return False
+        else:
+            first_item = self.inventory[0]
+            first_friend_item = friend_vendor.inventory[0]
+            self.swap_items(friend_vendor,first_item,first_friend_item)
+            return True 
+
+
+
+# ------------- Wave 5 -------------
+# this is using inheritance/ child and parent class and the super method
+
+
+# ------------- Wave 6  -------------
+
+    def get_best_by_category(self, category):
+        highest_condition = 0
+        quality_item = None
+        matching_category_items = self.get_by_category(category)
+        
+        if matching_category_items == []:
+            return None
+        
+        for item in matching_category_items:
+            if item.condition > highest_condition:
+                highest_condition = item.condition
+                quality_item = item
+        
+        return quality_item        
+        
+    def swap_best_by_category(self,other,my_priority,their_priority):
+        # this will return the best item in my inventory that matches their_priority category
+        my_category = self.get_best_by_category(their_priority)
+        # this will return the best item from other inventory that matches from my_priority category
+        other_category = other.get_best_by_category(my_priority)
+        # invoking the method swap items that will swap the best items in their respective categories 
+        
+        total = self.swap_items(other,my_category,other_category) 
+
+        return total
+