Not the only safe option. For large transactions using a reputable escrow company is common and safe - also protects the buyer who might be weary to wire transfer you large amounts of money before getting the goods.
For expensive used car sales to private party I would prefer to use used car dealers with consignment model - I sold one of my Teslas this way, costed me ~$1,000 for the dealer to take care of the transaction, I find the buyer, they check out the buyer, I give them the car, they give me a check, they collect the money from the buyer and give them the car. If there are any issues with the buyer, not my problem - they already know how to reposes cars, etc.
For sub $10K used car sale, you can even go with cash.