Need advice and also a warning.

What he did with the sale was criminal. I would go there with the police and ask for your car or at least to see it to confirm it exists. I don't believe it does. You are holding all the cards with those receipts. Do not give them to the police make copies. You need to confront this ASAP. That first receipt puts him in jail for fraud. The second is grand theft. The local police are probably waiting for someone to come forward with evidence on this guy. You are not the only one . They start off small and grow as they get away with things. Get in your car and go to the police. Ask for a criminal Detective and make the report.