I usually don't give my advice here, but I figure I would for those who want to buy games cheap.
It's clear that the xbox one is not doing as well overseas...take advantage of this opportunity. If the game was released in the UK, check the price on amazon.co.uk before buying on amazon.com. I was able to grab the thief limited edition for much cheaper even after the £4.95 shipping, you don't pay VAT on amazon.co.uk either. GAME has games cheaper than they are on here as well from time to time, take a look out there if you don't mind waiting a few extra days to get your packages.
Make sure you check with your bank as to how they handle the fees as well, my bank only charges me 1% on whatever I buy...so usually anywhere between 25 cents to a dollar on top of whatever the price is for video games.