This appears to be the prevalent scam method since the Verified program started July 1, since they can’t post in the swapmeet forums. The scammer contacts the mark by email and offers a bogus item after seeing their interest in a legitimate item for sale on the forum. It sounds like they might also do it via PM if they have control of a hacked QRZ account. Always be extremely wary of anyone offering the item besides the original “for sale” poster. It’s almost certainly a scam. Also, the usual advice applies of checking that the email address, physical address, and name matches the one on QRZ. I’m selling a couple of items currently and took the precaution of putting a message on my bio page that any email purporting to be from me but using a different email than listed is a fraud.