I've had remarkable luck picking up used small-business servers off Craigslist. I don't have much need for speedy graphics, so a Lenovo TS-140 with a bunch of

I've had remarkable luck picking up used small-business servers off Craigslist. I don't have much need for speedy graphics, so a Lenovo TS-140 with a bunch of memory for $200 was a great deal. That, a Debian USB key, a cheap mechanical keyboard, and a wide-screen monitor from Goodwill made a great coding box for me.