People can buy a Windows 7 or 8.1 key for $5 or $6 and install that edition. Then immediately upgrade to Windows 10 for free from USB created by Microsoft's Windows' Media Creator Tool so I do not understand why Windows 10 licenses are more money. Just a little more time with less outlay for BTC for the same result. Once the computer is upgraded to Windows 10 the computer is licensed for life (can even do a new clean install on it after the upgrade).
Are that legal keys?
Yes, legl, retail keys purchased right here from Marc Cara. All activated no problem (checked with MS) and all upgraded and activated on Windows 10 using USB install media made from Microsoft's media creator tool. One compute was upgraded to Windows 10 the day after Windows 8.1 was activated using key purchased here. Other keys were purchased six months to a year ago.