I sold him a Sony VCR. As soon as he received it, he filed a return claiming it was defective and didn't play tapes. I assumed this was BS but thought maybe it had been damaged during shipping.

Sure enough, when I got the VCR back and tested it, it worked perfectly fine and there was zero damage to the unit. He just claimed it was defective so that he didn't have to pay return shipping. Wasted my time and money.