You linked "origins" not "collector's."
This is collector's for PC:
Linked from http://us.battle.net/overwatch/en/buy/
click yellow "OVERWATCH TM COLLECTOR'S EDITION" button on the right
click yellow "PRE-PURCHASE NOW" button at the bottom
it scrolls down with an Amazon link
Amazon link says Unavailable (hopefully that will change, but I have no idea whether it will)