This has worked well for me in the past. I ask the buyer to send a certified bank check for the amount via US Mail, registered and return receipt requested. The seller now has my signature that I have received his money. (If I dont deliver he can use the post office fraud guys to investigate me.) I ship the sold goods and provide him with the shipping info. I track the shipment via UPS/Fedex etc over the web. I know when it was delivered. When the buyer contacts me that the goods were delivered and are acceptable to him I then cash the check. Never had any problems doing it this way and never had anyone not agree to it.