Okay it seems like some of you don't actually know how the currency work so let me explain:
If you use my £10 code, the funds will be added in your Steam Wallet's current currency worth £10. This means, that for example you use my £10 code in US, so the amount will automatically transfer to your currency, which is USD, and it will transfer an amount of money equivalent to your currency. In this case 1 UK£ =1.504965 US$ so it will transfer £10 into $15.04, and same applies to any other country or region that you live in.
NOW if you still have questions, just PM me, and i'll try to explain you even better, like a decent human being i am..
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So it still transfers to slightly more than $15 and you will be able to buy your game
Last edited by Smaguris; Dec 15, 2015 at 08:13 PM.