Take a ton of pictures from every possible angle when you drop off the car to the shippers or right before they pick up. Don't forget the interior, underhood, and chassis. You never know where they are going to tie down a car at and I have seen plenty of control arms and sway bar mounts bent. As far as paying bank transfer or money orders are the best. Typically I require a deposit, then I send the title, receive the balance of the money, then let the car go. Ebay also has plenty of escrow accounts that sound like they would work well, though I have never tried one. Depending on expectations on one side and the description on the other you never know what someone is expecting to get. Good luck.