InogenOne G5 Oxygen Concentrator £ 1,100 or Best Offer

A pre owned InogenOne G5 8 Cell oxygen concentrator I purchased from InterMedical for £1,695 in March last year. I have barely used it, and now that I have had Lung Volume Reduction Surgery, it's very unlikely I will use it again. It comes complete with a carry bag, AC Charger and Car Charger.
If you are interested, I advise you to check with your Consultant, GP or Nurse whether this is suilable for you.