With 3D printers dropping below the US$200 mark, the home 3D printing revolution appears to be getting into full swing, which is great … if you want to make things out of plastic. Unfortunately, the price of commercial metal 3D printers means the ability to print metal objects has remained out of reach of most people. That could be set to change with a team from Michigan Technical University building a 3D metal printer for under $1,500.
http://www.appropedia.org/Open-source_metal_3-D_printer