I think it'd be cool if there was a house addon that you can get called "Store". This includes a room with a counter for selling items and a cash register. People from the town would come and purchase random items off of the player, giving the player gold and removing part of the players stock for that item. An alert should be sent to the player when a customer has entered their shop, as I don't think anyone is going to stand in their store 24/7 waiting for a customer. It'd be cool because it'd add a new, never ending activity to keep the player busy. It'd also add a new way to earn money.