Back in October, I ordered SMB3 on GBA from overstock for about $11 shipped. They sent me the strat guide. I asked if I could have a refund, and also told them that they should better distinguish their categories, since it's easy to mistake the two (like in this case).
Anyways, they then tell me that, If I'd like, I can forgo a refund and instead simply return the guide and recieve the game instead. Of course I said yes. So you may or may not be able to argue that it was their fault for having such a misleading item description, and get the actual game for that price. It worked for me.