With spots on Forbes' richest people list, these billionaires are going places. But it turns out their favorite modes of transportation are as varied as the ways they got all that money in the bank to begin with. One housewares entrepreneur drives a car that would sell for only about $1,500, while a certain software mogul could sell his car for $4.4 million. That's enough for four dream houses. Some of these vehicles are stars on their own, while others are only notable because of the billionaire behind the wheel. -- By Ashley Lutz