Microsoft is quick to note in the product pages that you still need a PC that meets the minimum system requirements for Windows 11. In fact, Windows 7 keys can reportedly still be used to activate Windows 11. The same situation was true in the early days of Windows 10, when many people successfully installed it using keys intended for Windows 7, 8, or 8.1. Microsoft didn't sell product keys specifically labelled for Windows 11, but you could perform a fresh install using a Windows 10 product key. Even though many PCs come with a Windows product key, the option to buy one is still helpful for people building their own computers, or anyone using Windows in a virtual machine. Before now, the only official way to purchase a copy of Windows 11 was on a USB drive.
The prices are identical to their Windows 10 equivalents: Home is $139.00, while Pro costs $199.99. PCMag pointed out that Microsoft now sells Windows 11 Home and Windows 11 Pro as product keys on the Microsoft Store.