As for the picture discussion, if a guy is far away, I will snap a ton and auto upload to Flickr. Local, come look at. I also tell newbies it's going to break, be prepared. I told a guy the other night he is better buying from a retailer who can offer a warranty.
I don't take deposits from pinsiders. Their word and reputation work for me. If they break the deal for a less than worthy reason, they are dead to me and everyone I personnally know. There are a couple if this in pinside who I won't disclose.
If I am hauling a game for them, then possibly a deposit.
I do love it when the wife comes and inspects the machine.