Simple Seller +/- System?

[Lucy]

Hey vgmdb-team and guys,

I don't know if someone has actually asked for such system here on vgmdb, but let's give it a try: VGMdb needs a simple Seller Rating System for finished deals.

I've a idea for it but I don't think it would be easy to make: Seller and Buyer agree both via a panel that they will do a deal. The reason for the panel is simple, it's for avoiding abuses due 3rd people. After the deal's done both Seller and Buyer can leave a simple positive or negative note with a short message which should be visible for everyone.

How sounds that?