Many years ago, I knew a guy who built cars that were among the best in New England and that were superstars in Canada, which seemed to be a couple of years behind us in the latest technology. In addition to his weekly winnings, he made a few bucks selling the up-to-date parts from the car. Finally, he got a request for a whole new car. He made a deal that the customer had to pay a relatively high price, plus supply a "trade-in". My acquaintance towed a brand-new race car into Canada on a Saturday, and returned home with a very beat-up car, painted identically. "Looks like it was a bad night," said one of the customs inspectors on the return trip, noting how bad the car looked. Of course, the late-night inspector was not the same guy as the guy who saw the car go into Canada in the afternoon. It worked so well, he did it a number of times. As far as I know, he was never caught at it.