Been here since 2009, and never had any issues up until somewhat lately. Worst one was I claimed the rifle, the seller then posted about 10 minutes later saying that it was SPF and posted a claim time that was after my "I'll take it" post - and mine was the only reply to his FS thread. That's piss-poor. Had another similar instance after that, so I've pretty much come to the realization that "I'll take it" now carries little weight here.
Maybe the buyer reached out via PM before your reply in the listing thread?