Thanks for the reply. The seller reports that it has maybe 50 hours on it. He reports that he could never keep the mask on his face for more than an hour after falling asleep, no matter what straps or masks he tried. He said there are many masks that go with it, attesting to him trying several. He j...

The seller said it is a 550p.

This is the one for sale I am looking at on the 26th. It seems like a pretty nice machine based on what I have read. the auto a-flex sounds good to me... What can you tell me from the pictures?

http://portland.craigslist.org/clc/hab/4232177835.html

A good friend of mine has no health insurance and has terrible sleep apnea. He wakes up every two minutes. I can hear his throat relax and then he barely gets any air. He moans a lot when he sleeps. He said he couldn't afford $1000 machine and just suffers. I suggested getting a used machine on Crai...