I hear you...I guess this recent rash of this nonsense just has me a little jittery. But, if a scamster wanted to get really sophisticated, here's a possible formula:
1. Go search the grade me forum to find a cool (and expensive) book that was posted by a user some time ago with a very small number of posts that appears to have gone inactive.
2. Create a fresh account claiming to have previously had an account here (referencing the inactive account associated with the grade me post years ago), but unable to resurrect it because of forgotten passwords, etc..., and offer for sale (without current pics) the very book that was posted in the grade me forum by the inactive user...wool pulled.
Sounds like a sophisticated effort, I agree...but if the straightforward scamming approach is proving ineffective, perhaps one would invest the energy to get a bit more advanced. Having said that, I agree that it might be legit...as I said, I'm just a bit edgy because of the increasing frequency of apparent scams we've seen lately...