It is properly legal in EU (and British isles) to market the OEM license after a single has bought the computer. By the EU legislation, the running system license is tied on the hardware only to the Original sale and becomes a self-contained, specific item of sale afterwards. I found https://andypgnub.thezenweb.com/the-single-best-strategy-to-use-for-copyright-bills-on-darknet-75133934