They only way to do that, I wouldn't imagine, would be used from a game store. and that wouldn't pan out to be any cheaper.
I'm going to assume redoctane.com won't do it as they probably have a deal with Activision that keeps the game as a bundle. *shrug*.
So, to answer you're question. I would get the bundle, don't open the game and try and resale it on Goozex or cheapassgamer.