ONO is a novel approach to 3d printing and it uses your smartphone as a light source for curing of daylight resin. It should cost just 99$.
DLP 3d printers that use visible light from an LCD panels are getting more developed and should lower the price.
Here is Adafruit Industries talking with ONO crew about their machine:
PS: I'm not sure how do they expect that millennials give up their phones for the time needed to print something...