Mid negotiations for my Nilon SLR I received a form which was a magnificent copy of the USPS pre-pay thingie. Post the camera, and walk to the next window with the receipt. Yeh, right.
Their address was in Washington state, but the camera had to go to a small collection agency.

I looked for 62,000 some road or another, their home, on Goo Earth. It had four fine houses in a posh road. I'd imagine 6 would have been the highest number.
I e'd the buyer and said, Are you near the golf course? and other general natter as though I'd been there. They fluffed around the answer but
kept on going.
I was going to weigh a brick and send that - it would have hit them with the postage, and I'd have said, if the money clears, the real camera will be with you next day. But I took the quick route and said, What is that FBI stamp on your money order?
Never heard another word.
.