I sold a personal mobility scooter for $150 buyer saw and tested it 2x prior to purchase. Scooter worked fine and buyer found it in acceptable condition at purchase. no receipt given buyer was told no refunds and agreed to it at time of purchase. 4 days later buyer calls to say he changed battery and melted some of the wires and now wants his money back. I told him no it was final sale plus he admitted to doing damage to scooter after purchase. he then stated he is going to take me to court. does he have any chance at a case?