: Note if the unit has been used in a smoke-free home and if all accessories (batteries, AC/DC chargers) are included. 3. Understand the Valuation

Avoid general marketplaces like eBay or Craigslist, as selling medical devices there often violates their terms of service and may yield lower returns. Instead, use specialized medical equipment retailers:

: Known for buying used Inogen and other portable models for "top dollar".

: Some retailers offer a higher value if you apply the credit toward a new "upgrade" unit rather than taking a cash payout. 4. Shipping and Logistics

: Contact local waste services for proper disposal of medical electronics and batteries.