I've tossed this idea around a little...

http://www.heatware.com/

What is HeatWare?

"HeatWare" ( www.heatware.com ) is a private traders' evaluation and reference site used by members of various BBSs (Bulletin Boards' Traders Forums) which allows one to post evaluations of his or her private trades or deals with another. In order to submit or receive an evaluation, you must register for an account on HeatWare.

It's very similar to eBay's seller rating tool. It would make it extremely helpful in terms of buyer/seller ratings. If it catches on well enough, it could eliminate the need for a buyer/seller feedback section altogehter. And, of course, it's not board specific, so your feedback carries over to other forums if you wish.

Best way I've seen to implement it is to include a link in your sig. Participation would be entirely optional. If you're a frequent buyer/seller here, I urge you to give it a try.