if you live near a Toys r Us in the states, odds are you can get both for under $20 a piece, I got them each for $18 just a couple weeks ago.
I am sad that there is no campaign co-op.
Thanks for the Toys R Us Tip. There's one just down the highway from me.
These have some kind of local coop, right? Is it the zombies thing? I've only spent a very little bit of time with COD games, I think on one of the first Modern Warfare games, which had a selection of coop maps.