1, hanging in the idle fish and other second-hand trading platform: in the idle fish and other platforms to publish the sale information, waiting for interested buyers to contact.
2, in the local second-hand market or medical equipment stores: you can go to the local second-hand market or medical equipment stores to ask whether to buy used ventilators.
3, contact ventilator manufacturers or dealers: some ventilator manufacturers or dealers will buy used ventilators, you can contact to ask whether to buy.