Samsung D600's for £110 in Tescos.
They had an offer on last week (don't know if it's still on) for £10 off if you spend more than £40.
Think about it....
If you're buying the phone for £110, thats more than £40, thus, you get it for £100
My mate suggested this to the staff and they disagreed and said it must be £40 excluding the phone, but my mate argued and the staff couldnt find anywhere in the terms and conditions where it stated that it must not include the phone, so he got it for £100
...and used the tenner off to get it unlocked lol