Retail licenses are transferrable, OEM/OEI licenses aren't and are tied to that specific hardware.

Win 11 Pro OEI, $149

https://www.microcenter.com/product/643566/microsoft-windows...

Win 11 Pro Retail/FPP, $199

https://www.microcenter.com/product/669901/microsoft-windows...

I'm certain OEMs are getting volume discounts, and Microcenter is adding their own margin as well.