GCE ZEN-O Oxygen concentrator. Ready to help the next person who needs a boost in their oxygen supply. In my opinion, this is the best one out there in terms of portability, effectiveness and ease of use. Comes with two rechargeable batteries and charging brick. You simply add whichever cannula will suit you best, according to your preference.
Only a handful of battery charging cycles on the meter, so it's as close to new as it gets. These are $3500 in the store, so this is a great way to get one if your insurance won't pay, or won't pay enough. In our case, "her ladyship" required oxygen after a near-fatal auto accident, and while Medicare paid for one of those large units that stays plugged in at the house, I needed to buy the extra portable unit for when she had to go out to medical or other appointments, especially up in Flagstaff. So that's why it has such little use, but it really made a difference the few times we used it. Time for someone else to benefit!
Craigslist scammers, don't waste your time. I know all your tricks. Go get a job like the rest of us. For the rest of you local, honest people, thank you for your interest in this listing.