Amazon is currently out of stock on 3 X1 500GB SKU's Standalone, AC Bundle and MCC bundle, MCC is currently listed to be in stock on 27th July and Amazon is no longer listed under the sellers on the other 2.
Meanwhile PS4 is currently on offer with the Batman Bundle + free Tomb Raider for $399.
Edit: After my origional psot I refreshed the page and it seems now Xbox One 1TB MCC bundle is now on offer with a free copy of Tomb Raider + 3 month Live for $399.