Hey TRX, have you/the mod team ever though of adding a buyer/seller review section in the "for sale section"?
I've seen it on other forums, and it allows the community to know who is a good seller/buyer, and who has had problems so that future buyers/sellers know what there dealing with, and can make a smart decision on whether or not to deal with them.
Just a thought that I was hoping could be brought up in your guys private chat section.