Allen has always followed one key strategy when picking out investment cars: Buy what you like. "I have lived by this motto, and after all these years of doing it, I've never been disappointed," he says. "I know other car dealers who have sold cars at auctions and lost thousands of dollars, and I always want to ask them, 'Did you really like that car, or did you buy it because you saw it and thought there was money there?'"
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