Jeep is the leader in four-wheel drive technology and recreation. In fact, roads that aren't accessible by cars, but are by four-wheel vehicles, are often called "jeep roads." With distinctive styling and an array of four-wheel drive vehicles to choose from, their tagline sums it up: "Jeep. There's Only One."

AutoGuide.com has thousands of used Jeeps to choose from, including the Grand Cherokee and slightly smaller Jeep Liberty. Fans of the rugged outdoors may search for a used Jeep Wrangler.