OK this totally also depends on what location your at.
For example EU Laws states that you are allowed to resell OEM Windows keys on the open market.
What does that mean?
That means u can go on EBAY and buy a OEM key if you purchase the OEM key in from an EU person, and it is completely legal.
https://www.theregister.co.uk/2002/05/08/selling_oem_windows_copies_you/
The first sale in the Community of a copy of a program by the rightholder or with his consent shall exhaust the distribution right within the Community of that copy, with the exception of the right to control further rental of the program or a copy thereof. (Article 4 (c))The first sale in the Community of a copy of a program by the rightholder or with his consent shall exhaust the distribution right within the Community of that copy, with the exception of the right to control further rental of the program or a copy thereof. (Article 4 (c))
It was even taken to court via microsoft, and they lost.
https://www.techdirt.com/articles/2...-even-if-software-company-says-you-cant.shtml
That being said, you can go on Ebay and see Windows PRO OEM keys on sale for as little as 10 dollars from a EU Vendor.
You would however need another PC with windows 10 to create whats called a Reinstall USB and go about that way to install the said OS on the machine.
That being said, there is no reason to buy HOME edition, when you can get the PRO version for near the same price AGAIN as long as its from a legal source and a EU Vendor.
We do not promote piracy however this is not piracy as long as its sourced from the EU.
The only problem tho with an OEM key vs a RETAIL key is that the license is NOT transferable to another machine like a retail key maybe.
That means any major hardware change... ie, the motherboard mostly, will invalidate your key, and you will need to purchase another OEM key.
But for most people rarely do you encounter such a large hardware change, unless something is broken.