Just another worthless piece of shit from Florida. Always have a PO Box to have items delivered to. If you can video record the actual receipt of the return and open it right in front of a postal employee, that should be proof enough. Mail the asshole a collections letter saying if he doesn't repay you for your loss, you'll take that video directly to the buyer's police department and have mail order fraud charges filed against him. You have he evidence and make sure you say you have it all recorded. From his address being on the box, you receiving the package at the Post Office and you opening the box and displaying the contents there.