As of 2015, consumers can sell their used CPAP machines on SecondwindCPAP.com and 1800CPAP.com, and both companies issue payment by check or PayPal, according to the websites. SecondwindCPAP.com offers payment within 24 hours and free shipping. After machines pass the 1800CPAP.com inspection, the company typically pays within 10 business days.
SecondwindCPAP.com provides a link to an equipment sales form on its website for consumers to offer their used CPAP equipment for sale. The website lists the manufacturers and models of machines that the company purchases. Consumers can send an email directly to the company's buyer if they have multiple machines to sell or if they would rather email their information, notes SecondwindCPAP.
Consumers who offer their used CPAP machines to 1800CPAP.com must email the company to request price quotes before they ship their machines, explains the company's website. The website lists the makes and models of machines that the company accepts for purchase, as well as the machines that it does not accept.