Was in local Costco yesterday (Glasgow) looking for the Blur game posted, on the PS3. No joy on that front, only had Xbox 360 version, but i noticed Fifa World Cup game at a cracking price on both the 360 and Wii.
Xbox 360 - £5.83 including VAT
Wii - £8.18 including VAT
Obviously may be store specific, but as with Blur game, hopefully not.
One point to note, Blur game at Glasgow on Xbox 360 was marked at full price, but woman confirmed it was indeed £9.xx something including VAT.
So, if you see the Fifa World Cup game on either of these formats at full price, it may be worth asking them to check price, as think these stores generally run off same pricing system.