+1 - 3D printers serve two markets: production of prototype quantities and the immediate gratification of "having this part now". The larger of those two goal

+1 - 3D printers serve two markets: production of prototype quantities and the immediate gratification of "having this part now". The larger of those two goals pretty much precludes adding shipping time to the process, and the increasing ubiquity of 3D printers is making shipping unnecessary.