Most people should realise by now that TNT can and will freeze for pretty much anything even if it wasn't intended. That includes profiting from somebody else's account being compromised even if you didn't know about it.
^^^^^^^^^This. This was perfectly stated Waser.
TNT is a group of paranoid hacks that is ice happy. You could be all, "Tralallaalalala. OH LOOK. A CHEAP LAB MAP PIECE IN THE SHOP WIZARD. =D"...ten minutes later..."WTF. WHY DID I GET ICED?"
So, really it just depends on how lucky you are. I'd definitely not sell the books. At least not right off. SDB them, print screen a few screenies of the books in case you need to submit a ticket. And definitely don't forget the username you bought them from. If you happened to screenshot their user, that would be fortunate in case you need to submit a ticket. I hope they don't get you. Good luck. :3