I am looking to pick up a copy of the above - not concerned if it is GOTY edition or not. I already have a copy of the PC version, but would like to play with some friends on Live as well. Clearly I don't want to pay full price when I'm double-purchasing a game! I would like a copy in good condition though.
Unfortunately CoD4's price seems to be a bit stuck - it's still £44+ at retail and about the same preowned. Cheapest I have found it online is about £32. I am looking for something more in the region of the low twenties.