Currently the best price i can find on the web for this game seems to be £17.73 @ the Hut.
It's 17.99 Online @ Tesco Entertainment
I picked up a copy at my Local Tesco's today for £12.00, no bad uh? Although i know this game's price will only fall in the long run as the new expansion packed version will be out next year ie GOTY edition. But for now it seems like a good price.
(Available In-Store Only) Check Your Local Store For Stock.
I know there was the Game.co.uk deal @4.99 but it is showing out of stock at the moment, so i would say that this is next best price and unlike the Game.co.uk deal, your guarenteed to be playing it today/tomorrow or even Xmas Day.