I am a member of a auto forum and they have a thing called iTrader to rate transactions between users. I think it's a good idea to help judge how trustworthy a user is. With all the transactions going on with BD sales and trades it seems like a good way to get a quick look at the trading/sales success rate the user has. Here's a small pic to show what I mean.
What does everyone think?
untitled.bmp
This is included under the user info on the left pane