New
#11
This is the correct answer ^^^^. I have had fairly good luck with this in the past:
Buy cheap Windows 10 Professional 32 64 Retail Key - Electronic First
With Microsoft's digital licensing for Windows 10/11, the product key only needs to work once.
The first product key I got from them would not activate. I called Microsoft and they activated it for me. I also notified ElectronicFirst of the problem and they sent me a replacement product key that did activate on its own, without a call to Microsoft.
If you absolutely positively cannot get their product key to activate, I will personally refund your $5.00.