https://www.gamespot.com/articles/xbox-one-x-pre-order-guide-gamestop-best-buy-more-/1100-6452672/

September 22 update: Amazon also now shows itself to be sold out, joining Target. A number of other US retailers are still offering pre-orders, but there's no telling how long they will last. Similarly, we don't know how easy it will be to find one in stores on release day, November 7.

September 21 update: More Xbox One X-enhanced games have now been confirmed, but Target has apparently sold out of its allotment of systems. Other retailers still show stock being available, however. Meanwhile, Walmart has brought its pre-orders online, giving you another potential place to pick one up. Stores may also have a limited selection of Xbox One X systems on its release date, November 7.