I looked at this every which way before I bought a new one. If you buy one used its typically locked into the car you bought it from. You can unlock if for a fee, I think $100.00. Then to buy into the free tunes for life is like another $125-150.00. Don't quote me on the prices, but I'm close. It just doesn't make sense unless you can buy one Very Cheap. Then you don't have a warranty. When you buy one from AM your basically getting the tunes for life free because every dealer sells them for about the same price around $379. Plus if you can make the show on Sunday you'll probably save $50.00 that's my experience.