[TylerE]

I mean, for a power supply, bluetooth receiver/chipset, actuator... I don't think I cobble together something half as good for twice as much, and that's not factoring in labor.

[paxys]

It's really about the economies of scale. You can get entire computers for $35.

[srtjstjsj]

You can get an entire RPi computer for $10. It all depends on what you call a computer.