I think this is a brilliant idea. It's being done in Africa (http://www.pocket-lint.com/news/1249...rican-inventor), where they are taking old scanners, printers, computer and other "e-waste" and building 3D printers out of the materials.

It think it would be awesome if someone could create a detailed manual on how to do this with e-waste. Creating a really good 3D printer for just $100 would be something just about anyone could afford to do. Better yet, it could really help third world countries move closer economically to the developed world.