I have a 2008 Hypoxico altitude system that I haven't used in a couple of years and need to sell. It does not have many hours on it - about 3000 from when it was used in late 2008/early 2009 and in late 2010/early 2011.
You can see it on ebay here:
It comes with:
Everest Summit II generator
Queen deluxe bed
At-home cubicle
HEPA filter