I am planning on buying an Apple Watch however I need to try and sell my Fitbits first. I have a Fitbit Charge and a Fitbit One. Are there any stores, including online, that buy used Fitbits. My last option is to sell it on eBay but I want to try and get as much return as I can. Also, has anyone bought or considered buying a used Apple Watch? Thank you for any suggestions in advance!