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The Xbox One has flitted in and out of stock at Amazon since selling out its initial allocation in July, after which the retailer couldn't guarantee consoles to be received by launch. Supplies of the Day One edition have long been gobbled up at other major retailers too.
The Day One edition comes with a few exclusive extras, including a special controller with a chrome D-pad, a Day One achievement code, and commemorative packaging.
Update: Yup, that was quick. Amazon's Day One Xbox One's are Xbox Gone.