Kantor on 29 January 2012
ShopTo and GAME are by far the most reliable, and I would say ShopTo is faster and slightly cheaper. Zavvi is usually cheapest, but its delivery isn't great.
Usually, if I'm buying a game, I look here: http://www.gamecrawler.co.uk/
It gives prices for most of the main stores.
(Former) Lead Moderator and (Eternal) VGC Detective 
