I just had one today for a MOE 15-22 all set up for after work. We agreed on a location to meet and I got the cash out and told my son we were going shooting tomorrow. An hour after we texted everything,he text back that a buyer that he thought was backing out somehow came up with the cash and was on his way to met him. I texted him back telling him of what I already told my son and that I wasn't too.happy.
I can tell you I've never backed out of a deal once its been agreed upon. Even when others have offered me more. I mean your word has got to count for something, right? I could be d**kish and leave negative feedback on here, but I won't.
You are not doing anything wrong by leaving negative feedback when a member backed out of a deal. That is exactly what the system is for. You are actually doing a disservice to the rest of us by not leaving appropriate feedback.