Just a simple "PS:" next to the users profile name in the classifieds so that people know how many things that user has sold in the past on the forum?
Each time the person sells something, there would be a button specially for them to say the item is 'sold' which would automatically increase the PS next to their name, similar to how the thanks function works currently. Just a way of telling that the member has dealt with people on the forum before and sold stuff with no bother.
