Not on eBay, and for moderately low prices? psyduck;
<$100
I saw some old computers at Thrift Stores.
YOUR MOMS GARAGE
W.E.M middle school.
idk, try goodwill or a pawn shop.
There should be a Computer Exchange. They know a lot(Not how the fuck to run an OS. They're stupid like that) so you may be able to get one cheap.