Call Of Duty: Ghosts keeps getting cheaper, to the extent that Amazon have undercut ShopTo's recent £34.99 deal for the Xbox 360/Xbox One digital combo pack. You'll get a digital download code for both the Xbox 360 and Xbox One versions, allowing you to retain your multiplayer progression across due to the server-side profile. If you want to get into Ghosts on the Xbox One but still have plenty of friends who haven't bought into next-gen yet, this could well be a serious saving. Mind you, I'd suggest prioritising it on Xbox One to enjoy the somewhat superior visuals and Ground War player count.
Thanks to Change_Me @ HUKD!