This is one of the best question can you sell used hearing aids. Yes why not, you can sell used hearing aid. If you think that device is not needed anymore then your can easily sell them to the one who really need it. But you can say it is not that easy to sale out Used or rebuilt (refurbished) hearing aids, However each hearing aid must have packaging and a tag attached to the gadget itself that clearly declares the device as having been previously owned/used.
Everyone want to save their money specially when they easily get used things in good condition then there is no need to waste money in new one. People should check out the condition of used hearing aid before purchasing it from owner of hearing aid device. People should keep their things neat and clean with proper manner because only then the chances of selling hearing aid is increases.