Rob,
This is something you are probably already aware of but just an idea I thought I would mention.
What they have set up on archerytalk (hope its OK to mention other site, I'm not sure) is a feed back strictly for the classifieds. Once a transaction is completed you are able to leave feedback that is viewable by all. You have to attatch the thread to your feed back to legitimize it and to let everyone see who is leaving the feed back. It works both ways were guys can leave feed back for buyers and sellers. EX: quick payer, smooth transaction, fast shipper etc. etc. It lets you build up a history almost like a small scale credit rating for others to view. Just an idea to throw out there. Joe