I owned a rep rap and we self replicated about 40 of them before I sold it. I stopped printing things and a buddy wanted it more than I did so IO sold it to him. I will be getting another 3D printer in the near future as my 4 children are into various projects and get a kick out of drawing in cad to make characters and objects. I want to help them bring them to 'life' .
Something else to consider would be to have a company like Shapeways or similar print the designs you make for you on their high end printers. They give you different options of materials to use and are pretty quick in the turn around times.