To get this price you just need to like them on Facebook here - https://www.facebook.com/cdkeyscom
If you can't get a code via this method then the price is still relatively cheap at £72.99
This edition includes some cosmetic stuff but also the Season Pass, which comes with 24 DLC multiplayer maps - equating to 2 extra maps per month for a year.
The same edition is £80 from Microsoft and if you're someone who game-shares then it works out as less than £35 for each of you for the game and season pass.
I think these CD Key deals tend to go cold, so we'll see how this goes, but fingers crossed a few people benefit from me posting it. :o)