Comment But what are they really worth? (Score 1) 260
A circa 2006 computer is in the only ~5x-10x faster than a Raspberry Pi, and has a power cost on the order of 100-200W/hr. So a 2006-era computer, even free, costs ~$90/yr just in power if its left on.
Similarly, for a non-profit trying to be uber-cheap, why not just go with ChromeBooks? If you are in a position where you can have a network (e.g. like an office environment), they are cheap, and the office and so-on that are needed for productivity.