The Amazon and Best Buy price of $44.99 went back up to the $55-$60 range (depending on PS3 or 360 and which store), but Wal-Mart currently has COD:MW2 for $44.96.
May also be able to apply a Bing discount (haven't verified this).
PS3 - http://www.walmart.com/catalog/product.do?product_id=11038613
360 - http://www.walmart.com/catalog/product.do?product_id=11038615
May also be able to apply a Bing discount (haven't verified this).
PS3 - http://www.walmart.com/catalog/product.do?product_id=11038613
360 - http://www.walmart.com/catalog/product.do?product_id=11038615