[mike256]

Ok if I'd like to buy 5 licenses instead of the one I need or do you know any legal way to get just one single PC with Windows 10 LTSC?

[hyperman1]

In the EU it is legal to buy a second hand software license. I presume you can buy one from these.

I did a quick search, but all of them seem to ask you to contact them for a quote. They claim 50-70% price reductions.