Update: The Digital Deluxe edition will also have Hearthstone card backs.
Explore the Warlords of Draenor Collector’s Edition
Warlords of Draenor Collectors Edition on Sale Now
The US version of the Collector's Edition is now being sold for $90 on Amazon.
Warlords of Draenor Box Art
Amazon also has nice high res versions of the Warlords of Draenor Box Art.