FYI if someone wanted to pickup lots of laptops like over 100 at a time. government liquidation auctions have them all the time.
That will be a great option to flip them to Linux and then resell them. This will be especially helpful if they are of the same setup/model. At that point, I would highly recommend you perfectly setup one of them, then mirror its drive to an external USB drive & use it to create copies of that drive for the rest of the laptops. This will vastly accelerate your setup process.
here is 94 laptops on auction.