Thanks for the clarification, guys. Before purchasing this item, I looked all over online for info like this but found nothing, so this is great to read.
My bank says that the money order was never chashed, so I called the dealer on the phone to double check and he claims to have never recieved the payment. While talking to him, I could detect that he doesn't care one way or another wether he sells this gun to me or not.
I got my money back on the MO, because it's clearly not going to be cashed no matter who has it. I'll just let this die and get the gun somewhere else. Thanks again for the advice, guys. I have learned a lot from this.