An automatic trading system would be nice. It's like you come to some special place where you can set a trade request. You put there an item and choose what you are willing to trade it for. Other players can also set their requests and so system would trade items between players automaticaly. Setting a trade request can cost a few fame points. Each request only lasts for a few days(or longer if you pay more fame). I think this would be a realy good idea.