I'm with persuader. My first vehicle was a little 94 v6 camaro that I got with 150k or so miles on it and ran it til the motor died at around 200k miles. So then I got my Ram it had 68k miles on it and I definitely felt like it was really low. Now my Ram is about to hit 80k miles and she's running just fine!
But like others said, I would find one that's cheaper. You'd kinda be getting ripped off at $21,000. I was lucky and got mine at 10,200 USD.