I think as VG mentioned, even though it would improve the system (there are, however, about a million other things that would) - a basic iTrader is better than nothing. As for the community, at the end of the day you'd just want to know where the commercial reputation of a certain member is at in order to come to own conclusions on how you'd like to deal with the person. The details of the transaction are probably more handy for administrative staff to get more of a backbone on a story.