I wonder how they deal with a scenario in which I give you money to buy me a car then you sell it to me for $200. Well, its probably a stretch in that case, but I can easily see some old lady buying a Lincoln and selling it to her son for a token amount. Id bet money they have something in place to deal that sort of thing. Theyre not going to sit around while youre paying $4 to register a current model year Lincoln. Or maybe they didnt consider it.
Probably the same way they would deal with that scenario when they levy the sales tax. What that is I dont know, but surely we're not the first two people who have had this discussion.