Here's an idea I offer to Joey Chicago and the other board administrators.
One of the other forums I visit (a photography forum) has a Feedback forum. It is one topic called simply "Marketplace Feedback" where people who participate in a transaction leave feedback for each other. Camera people are always buying and selling lenses, bodies, etc. amongst themselves, and this particular forum lets people know who is a reputable seller, etc.
If there is enough interest, perhaps we could implement a feedback forum here. It could be helpful to members here regarding which sellers are good, which to avoid, etc. I'll leave it to the administrators to make the decision on whether to go forward with this.