when will you people learn.
What to check out:
1. His posting history, very good and varied, IE not just in the sales area.
2. To see if he has sold succesfully to others, yes with good feedback.
3. Check if items are realistically priced and not "too good to be true", yes
What more can you do on an internet forum? At some point you actually have to trust someone not to do you over. In this instance it would appear that we all just got caught by a well timed scammer.