The standard Xbox Series X | S Wireless Controller RRP is around £59.99 but you'll commonly find a lot of colours for the £49.99 mark. During sales like Black Friday we actually saw several of the colours drop to as little as £34.99 which is just an insane price for such a premium first-party controller.
If you're looking at the Xbox Series 2 Elite Xbox controllers you're looking more in the region of £109.00 for the new Core version and £139.99 for all the bells and whistles which would be the regular black Xbox Elite Controller Series 2.