Feedback would be a great idea. The problem is doing it. I'm not even sure if the software supports a feedback system
i thought feedback was a good idea, but not so sure now.
take ebay, some tit's don't leave feedback which is crap. when they get a good deal, packaged well and posted straightaway.
(if on here (radbmx) they can't be arsed to let you know they've got the item what makes you think they can be arsed to leave feedback)
the museum, feedback can be left for anything from buying a £5000 bike to telling someone they've put their landing gear decal on the wrong way on the fork leg.
also your "mates" can bump your feedback up with made up items.
on the museum the feedback function is open all the time for you to give someone a score.
it would only work if the feedback option pops up when a transaction is opened.