In reply to Juandlc:
I think they are about £40 but it depends on current exchange rates and also the size and if you wanted a pair or not? Are you willing to have 2 lefts? There is also the old colour and new colours. Are you buying online or do you need to travel? You would need to include travel expenses. Some online shops have free postage but others have multiple postage options. It's all very complicated but there is a brilliant article somewhere which covers all of this. I can't remember where it is but perhaps you could do a quick search in google and you might be able to find it.
Wouldn't take more time than it took me to write this.