You can donate your machine to be safely recycled for reuse through these organizations:
CPAP and BiPAP machines, hoses, and masks cannot be recycled everywhere. It is important to check with your local recycling center. This will keep them away from the landfill, helping to protect the environment.
Please know that a physician's prescription is required in order to obtain a CPAP or BiPAP machine. Therefore, it is not recommended to sell your machine, hoses, or masks.