Thomas Sanladerer has been doing stuff with 3D Printing for a long time and can be seen as an expert on the matter.
With his latest guide to build a Prusa Mk2 guide anyone can build a 3D printer as cheap as possible. On his guide he has the build items and where to buy them. He has also added some videos on the builds.
The build continues and my parts are still in the mail. Ooh well it will happen soon.