With the exception of Product Key Cards (PKC’s) distributed with COA’s, Microsoft does not distribute products keys as standalone products. If you see a listing on an auction site, online classified ad, or other online page advertising product keys for sale,
it’s a good indication that the keys are likely stolen or counterfeit. If you were to purchase and use a stolen or counterfeit product key to activate Windows installed on your PC, the key may not work for activation, may already be in use on another PC, or
it might be blocked from use later by Microsoft when the key is reported stolen.
While those licences are not illegal, they are no use to you . ..
Those are volume licences for Windows 10, they will initially activate and after a month or so, they will de-activate as those licences are meant to be re-armed on a regular basis form the company servers, which you will not be able to do
Honestly, you would be wasting you money and would at a later stage have to purchase a legit copy of Windows . . .