Well they are cheaper in the UK now but still from around £440 for a 16gb one as far as I know. If you buy one and select an o2 sim/deal they will unlock it for you so it will take Turkish sim cards but you must sign up for a 12 month+ O2 contract, and honour it. Alternatively, buy any iphone and have it unlocked, but if you do that you will not be able to update it without it locking again.