Member "issue"

So BEFORE I mention who this member is, id like to lay out the facts. Guy offers to sell his fitech fuell command center that is a week old because hes going a different direction. He says its just like new, used one week. 300 bucks seems ok, so I PM him and say if its as he says, compleat and new, I will take it. I asked him if he would take a postal money order, because I dont have paypal. He asked where he could cash it and i tell him any post office. Hes ok with that, so I send it. Then i get a PM that the post office didnt have enough in drawer to cash it, and that he took it to the bank cause his work prevents him from going to the post office. Said it will be a 10 day "hold" before he knows if its good. Wait longer than that, no comunication from him, and I ask whats up, He offers to send money order back. Then he says he cant belive i ask for it back, its gonna be a longer wait, and i get a "F" as a buyer. so I have NO money, and NO parts. Opinions guys?