$1795 SPRING SALE on Inogen G5 and G4 Systems! CLICK HERE or CALL NOW!

Now buying used portable oxygen concentrators

We buy Inogen One Oxygen Machines!

11-5-2021: Not only are we paying “Top Dollar” for used Inogen machines, but for a limited time, we will also pay the FedEx Shipping. FedEx will come to you with a prepaid label, stick it on and ship it to us. Immediately upon receipt, we mail you a company check OR will send your payment via PayPal!

No Hassle Cash!

Want to know where to sell your portable oxygen concentrator for the best price or what to expect when you sell your portable oxygen machine? Learn the basics below.

Quick Form – Quote To Sell Used Oxygen Machine

Complete form below and we will email you a price to buy.

see instruction below on how to get the hours off of your machine.
hours on machine
located on the back or bottom of the machine. Begins with "SN"
serial number
If you accept our Buy Back quote offer, how you would like to recieve your payment?

Do you have more than one machine that you would like to get a Buy Back quote offer for?

Caution! Make sure you sell your oxygen machine legally.

A sale of a portable oxygen machine in the USA requires a valid physician’s prescription. Portable oxygen concentrators are controlled by the US Federal Drug Association (FDA). Selling portable oxygen concentrators on Ebay and Craigslist is a violation of their terms of agreements.



“prescription drugs, medical devices; controlled substances and related items”



The list of prohibited and restricted items below covers items you can list under certain conditions, and items that we don’t allow at all. In our medical drugs and devices policy, for example, while we don’t allow many items (such as contact lenses), we do allow other items under certain conditions (including certain types of medical instruments).

When We Buy Your Used Portable Concentrator:

  • We pay the shipping cost.
  • We will pay you by company check.

All machines purchased by Main Clinic Supply must be in good working order, unless agreed to differently as part of the purchase.

In all cases it is absolutely essential that the machine comes from a smoke-free environment. Any indication or smell of tobacco smoke on these machines will be returned.