look in the deals section. today only you can get 20$ amazon cred for 10$. hope that helps. you won't get 20$ code till tomorrow, though (and you can't use paypal. that's why i didn't get any ).
what system you need it for? I have a copy for 360 that is in perfect condition. I only played it a few times and never used any of the manuals or whatever else is included.