Hi. You might try putting an add on Craig's list or your local freecycle and ask for donations of older computers. I love the G3 500 Mhz Powerbook (2000) and I bought 2 on Ebay, one was supposed to work but didn't so I am enjoying working on them with little fear of screwing up a great machine. I used to take apart old watches and toasters in the 50's and try to help my brothers and father work on old cars.

Salvation Army thrift stores and church thrift stores often have lots of old computers cheap. But if you can get them from freecycle.com or on a wanted add on Craigs list you will be doing someone a favor by taking away something they might otherwise send to a landfill.

Good Luck, Nancy