Hey! For $50, it would make a great cheap DOS controller for NC drill machines, etc. There are lots of current industrial apps that have timing problems on newer, faster machines. For example, I have written routines for a DOS based audio test system. It runs great on my 486-DX4 and DOS 6.22. It runs OK (but with some strangeness) on my Athlon 650 and DOS 7 (Win98 SE), but it locks up tight on my 1.33 GHz T-bird.
For another $20, it includes a 2.5 GB HD. This is a great deal if you can use it, and you don't have access to an even older machine at a lower price (including shipping).
OTOH, they'd have to pay me the extra $20 they ask to take a copy or Win 95b off their hands.