A used Inogen G3 can be a smart, cost-efficient choice for portable oxygen, with a compact 10-pound body and a familiar touch-screen interface. Many units arrive with recent service, two batteries, and a carry case; buyers should check flow settings and oxygen purity while verifying the unit’s power adapter and filters. Used Inogen G3
Inspect sellers for documented maintenance, ask for a recent calibration report, and confirm that the humidifier bottle is clean. With sensible checks, a used G3 can