These are over 10 years old and are not really useful for anything, they are passively cooled. All this is quite easy info from google....
So useless unless you really want to get your hands dirty on VDI but it seems a bit out of your league at this point in time. that's why the cost like $40 on eBay.
the only good news is that they do not require a license to do vGPU / vVDI