Nope. They're most likely locked. I know some guys from GameStop and they let me look at a couple of them, don't even bother trying to look for a bargain. The cheap ones are the ones that have been beat to death, and will look like total crap. You'll hardly get any resale value out of those.
Also, I noticed that by the name they alll had either "AT&T" or "Verizon" on some of them, implying that they were carrier locked.