I haven't gotten into them yet but I got two of these today.

http://www.jrsmedical.com/RESPIRATOR...P/product.aspx

Before anyone says fix/resell them for respect to the place I got them, they will be destroyed.

I'm excited to see everything in them is high quality metal parts, I see a good amount of brass: big chunks of it. Some decent copper tubing, wiring, chunks of aluminum, and there is a nice sized motor for the compressor(one missing). There is a battery of some sort because I accidentally hit a button and an alarm started going off.

We'll see how it turns out.