I don't typically buy used games. The last one I bought was maybe A Boy and His Blob and that was sitting on the shelf with the manual inside. Buying the game, lifting the manual then returning it at least protects you from possible legal ramifications. I don't think they keep track of what used games are sold with/without manuals. If caught trying to steal the manual from the store, GameStop could potentially press charges. Really, there is no difference since stealing is stealing. If one were to do it, there's clearly a safet way. I'm not trying to justify it; just saying it exists.