If you are on a machine that already has Windows 10 Home installed then the upgrade for that device to Pro is just $99 versus the full license costs of $199. help Reddit coins Reddit premium Reddit gifts. I do want a legitimate key and not have to deal with gambling on a $30 key from some website. I need 2 keys and I found a key on Newegg for $150 and one at Best Buy for $170. What's the best place/ way to buy a Windows 10 Pro product key? Help. This is not recommended, as these are grey-market keys, gathered from MSDN channels, each key sold multiple times (extra reading).You're not buying directly from MS so you're not buying a license, you're just buying a key and living on the promise that MS won't discover and. Note: Some people may recommend buying cheap keys elsewhere. WINDOWS 10/LTSB/LTSC INSTALLATION AND ACTIVATION. If you can find some random windows 7 box that has the license key sticker on it. New comments cannot be posted and votes cannot be cast. Most reliable cheap way to attain windows 10 pro key.
