You can find it at walmart online. In stock as i type. $499.
The catch is you must be a member of Walmart + to buy it. Walmart + costs $13 a month and will only renew if you leave it on auto remnew. Walmart + signup is a thing that Walmart calls a trial. You try it to see if you like all the benefits. If not, just unsubscribe before your next month’s fee is due.
The series X will display at full 4K (if your TV or monitor set will also do 4K). Any PC version USB keyboard and mouse will work perfectly on the Xbox, including assignments in MSFS. Of course the controller also will too, and it is included with the Xbox console.
The TM HotasOne is designed for the XboxOne and the Xbox series X and series S. It works perfect for MSFS for me on the series S. It is a combination stick, throttle, and twist rudder. The stick and throttle are separated and run on just one USB cable. The Xbox X and S have 3 USB ports. The controller is wireless (AA batteries) and does not use up a port.
i have the Xbox series S myself ($260 from very reliable and large eBay mega store).
I use a 12" by 36" woooden white shelf board (Lowes or Home Depot about $10). Onto which I velcroed the HotasOne and in between that stick and throttle a compact wireless PC keyboard. And to the right of those a mouse pad. The keybaord and mouse work on the same USB dongle and uses only one USB port on the console. This keyboard and mouse combo cost me $34.99 on Amazon. The keyboard is under 15" wide and has the full numberpad: " Wireless Keyboard and Mouse Combo, LeadsaiL Compact Quiet" LeadsaiL is a Chinese company. Keyboard, mouse, TM Hotas have given me zero issues.
MSFS boots up in 2 seconds! On my PC version it is about 4 minutes.