https://en.wikipedia.org/wiki/3D_printing
http://www.tomsguide.com/us/3d-printer-buyers-guide,news-17651.html
http://3dprintingforbeginners.com/
https://3dprint.com/80624/buying-3d-printer/
So far this looks good…
http://www.colido.com/en-uk/product-uk/colido-diy/
Seems to have a good community and the firmware is getting upgraded.