I have two Haskel boosters I'm putting up for sale, O2 clean and ready to go - an AGD 15 w/pilot good for boosting air or nitrox to 4000psi, and an AGT 7/30 (pilot available) good for emptying O2 and He bottles down to the last 25 psi. They are driven by 150-200psi pressure. I'm asking $3,500 each.