I wonder if it would be worth adding a feedback thread for items sold here in the forum.
I participate in a photography forum that has a sticky thread in the Flea Market / Sales area of the forum titled "Positive Feedback Thread (post/search here)". It's for posting positives, not negatives. Take a look at the explanation and see if you think something like this might help here too: http://www.dgrin.com/showthread.php?t=7739. The postings there show feedback from (and for) both the seller and the buyer.
--- Denise

