This group helps people fix computer issues and figure out tech questions. Their thread at https://www.reddit.com/r/GetComputerHelp/comments/1o2zje8/where_to_buy_a_windows_11_key/ shares advice on buying Windows 11 keys safely. https://www.reddit.com/r/GetComputerHelp/comments/1o2zje8/where_to_buy_a_windows_11_key/