I am going to test out iTrader. Its an eBay like Feedback Option.

iTrader for vB 3.5.x has evolved from Trader Ratings for vB 3.0.x which evolved from Buy/Sell/Trade User Rating System for vB 2.x. This is a rating system for when members buy / sell / trade items from each other (presumably on a FS section of your forum). iTrader came about because it was a pain to try and maintain a single thread listing good / bad traders and so far has worked out quite well.