Whist on the subject of change is there any way of every member having a 'feedback' option in the drop down where you normally PM or view their profile etc.
So if you have bought or sold something to a member there is a simple way to leave feedback or more importantly if you are about to trade with the member than you can easily access their history and see what they have done in the past good or bad. This would definitely help weeding out the fraudsters as per ebay, if anyone has any negative feedback you are then weary of them before you buy.
In the current system it's not easy to view or leave feedback.
Just a suggestion