buyer/seller integrity question

I agree with the folks above who say that you owe him NOTHING. If he makes threats, say "See you in court". Unless he can prove that you lied and/or offered him some kind of a warranty, he doesn't have a leg to stand on. The car was 59 years old, and he bought it sight unseen. No judge would award that idiot any money. Call his bluff if it comes to that.