GMG 24 hour special - Great price for a non-russian key.
When you buy it you'll also receive an account-linked voucher that is valid for 72 hours which entitles you to 30% off of any one Borderlands 2 or XCOM Enemy Unknown DLC.
If you don't have an account with GMG already and you're feeling generous, here's my referral link which will credit us both with $2 after you make your first purchase: http://www.greenmangaming.com/?gmgr=fununuga
only $15 if you buy from GMG UK.