If you would make a rule that people should use the "Mark AS Gone" button which closes out the thread instead of typing in SPM or TPM or what ever silly acronym they make up it would stop a lot of old ads from floating around for years. Honestly I have never understood the SPM thing. Mark it as gone. If it falls through then click the "reopen listing" and put that the deal fell through. Not complicated. I see listings all the time where someone comes on and asks "is this still available" and the reply is no, it is sold weeks ago and yet, they still don't mark as gone.