A feedback rating may be a good thing to display on a buyers/sellers auctions. Case in point: I bought a .25 pen gun from a "private seller" (email@example.com) on 2/25/07. I called the guy just after buying the gun to confirm that we were on the same page. He was in agreement, I wired the money and he promised to ship the un the next day....... So far I haven't got the gun, he won't take my calls (voicemail), no resopnse to email and again no gun. I'm not sure if a rating would have prevented this but at least I could leave a warning for others about this crook.