I think it would be a great idea to allow players to swap items with friends. Of course it would be set to a limit number a day. And the amount you could swap would be based on the item. Exp: Like a evolutiom matireal would be 1 for 1, while silver and exp scrols would be a higher range. Or 1 evolution matireal for silver at the high range. Each swap would be counted as 1, up too like 5 a day. Just a base thought.