I have a used Extreme Oxygen H-1 Oxygen Concentrator for sale or trade.
15 LPM - 20 PSI

NEEDING TLC!
It steadily loses pressure after about 20 min of runtime.
Hoping to find somebody a little more hands-on than myself, looking for a project.
Bought it about 4 years ago, it ran perfectly until 6 months ago. Moved to a new shop with liquid 02.

Located In Denver, CO. Hoping to avoid shipping it.

Originally paid $1250, looking for roughly half that at $650! Feel free to ask any questions, I'll answer as best I can.
Thanks for looking!