Originally Posted by lux
aren't I not guaranteed to find someone that would want to buy it right there? (for roughly the price of 'used' at titles)
I think a lot of people might want to price compare first. I know if someone tried to sell me a book right after the first lecture, like you said for roughly the same price as used at Titles, I'd probably either try to haggle a bit, or go on Facebook or Macinsiders to price compare. But that's me, maybe some people won't. I think Titles used prices are too much, so I would want to be getting a more reasonable price, but not too cheap so that you're still getting something back.
Also, they'd want to know what edition it is(so they know they're getting the right one in case it's been updated.. I've heard of people buying last years outdated textbook by accident, and missing out on half the new material.) Facebook, and this website works well too. I once bought a book from Facebook for a good deal.
That sounds like a good idea though. Good luck!