When I graduated from college, I headed out to the west coast with my bicycle and a couple friends and biked home (2 months, 3700 miles). We took an Auto-Driveaway Buick (had 30 miles on it when we picked it up) from Baltimore to Omaha, and then swapped it for a Jeep Cherokee that we drove to Oregon via Colorado and Utah. They were pretty flexible with the mileage and the time, and all we had to pay for was gas. It is a great way to get one-way cheaply.