Some medical items need a prescription; some can only be sold by authorized users; some cannot be sold at all whether they require a prescription or not.
https://www.ebay.com/help/policies/prohibited-restricted-items/medicine-medical-devices-healthcare-p...
"Any medical device that requires a prescription can't be sold on eBay, including:
Continuous Positive Airway Pressure machines (CPAP), along with masks, humidifiers, heated water chambers, and heated tubing"
https://www.ebay.com/help/selling/listings/creating-managing-listings/removed-hidden-listings?id=465...
"Why was my listing removed/hidden when similar listings are still active?
If your listing is removed or hidden by eBay, you may see similar listings still active on the site. This could be for several reasons:
- There may be differences between the two listings that are not obvious
- The other seller may be a rights owner or an authorized retailer of the item
- A participant in the VeRO program may have asked us to remove your listing but hasn't requested the other listing's removal. These types of removals are only done at the request of the VeRO participant; they are not eBay's decision. Read more about the VeRO Program
- Your listing was reported to us, but the other listing was not
If you think another listing isn't following our policies, please let us know and we'll investigate."
