https://www.theguardian.com/games/2020/sep/09/microsoft-price-launch-date-xbox-series-x

Next-generation console will go on sale in November alongside the lower-priced Xbox Series S

Microsoft has confirmed that its Xbox Series S and Xbox Series X consoles will launch on 10 November. The former will be priced at £249 (and $299), the latter at £449 ($499). Pre-orders for both will be available from 22 September.