I don't know if this has been posted yet but The Xbox version of this game will be $29.99 when it's released this November. Here are the links:
Gamestop
http://www.gamestop.com/product.asp?product_id=210575
EB
http://www.ebgames.com/ebx/product/242805.asp
Gamestop
http://www.gamestop.com/product.asp?product_id=210575
EB
http://www.ebgames.com/ebx/product/242805.asp