It's no secret that used cars are an affordable option for buyers—especially for penny-pinching millennials. "They really are making very pragmatic choices," said Edmunds.com analyst Jeremy Acevedo.

According to Edmunds.com, the most popular used car for millennials is the Dodge Magnum, a roomy station wagon. That's followed (in order) by the Chrysler Pacifica, Subaru WRX, Chevrolet TrailBlazer, Volkswagen R32, Pontiac Aztek, Nissan GT-R, Saturn Outlook, Dodge Durango and Lexus IS-F.