100 Buck Ventilator

It just points out what happens when medicine is "priceless". This is basically replaced by a fireman squeezing a bag. $100 is probably a reasonable price for something that works but it won't have all the bells and whistles you get with the $50,000 one. (nor the built in lawyer and regulation tax.)

This is the prototype but a real one could easily have a metal can that any metal shop could make, The rest looks like off the shelf parts and the mechanics could actually even be different. (cylinder and a crank shaft, linear actuator, whatever) The software in the PIC may be the part the MIT guys have to part with but I think this is in the public domain. The trick might be finding ventilator bags if you don't go with another mechanical pumping method. This is certainly a pretty simple machine and all the brains is just in adjusting the pressure, volume and speed.