feat: Fix some errors with listing formatting

sales.py

@@ -26,7 +26,17 @@ class Listing:
         for key, value in kwargs.items():
             setattr(self, key, value)
         
+        self.price = int(self.price)
+        # Fix any errors in the data
+        if self.price < 0:
+            self.price = 0
+        
+        self.description = self.description.replace('\n','')
+        self.description = self.description.replace('\r','')
+        self.description = self.description.strip()
+        self.contact = self.contact.replace('\n','')
         self.updated = int(time.time())
+        print(str(self))
 
     def __str__(self):
         return f"Domain: {self.domain}\nPrice: {self.price}\nDescription: {self.description}\nContact: {self.contact}"