I've bought one machine in a parking lot without turning it on, setting it up, looking behind the backbox, etc. I had been in contact with the seller for weeks though getting constant pictures and information about the machine. I also knew others who knew him and dealt with him before, so as expected, it turned out he was as honest and straight up a guy as he made out to be on the forums/email/phone. I was really happy with my purchase, but I would never do something like that with someone I had very little information or contact with.