Too bad its not a III+, the one that fixed all the problems.

I wrote an article about this machine a few years back:

http://lowendmac.com/coventry/06/apple-iii-failure.html

More information here:

http://www.vectronicsappleworld.com/appleii/appleiii.html

This website should help you get going with it:

http://www.wap.org/a3/

Definitely one of Apple's stupidest hardware designs, and the software also sucked (on the first model). But yes, $15 is a steal.