If you can get the win10 drivers, off lease small form factor pcs with win 10 are readily available for a few hundred. Just add any old display.
Microcenter here in the US carries a variety of Dell and Lenovo off lease machines. Usually, a Gen 6 or higher Core I5 or I7, 8 or 16 GB memory, 64GB+ ssd, with a good selection of I/O.