Where to sell a used Nitropad x230?

Hello - a few months back I bought a Nitropad x230. I got as far as the setup page before realising this is probably beyond my security needs and am now looking to sell my Nitropad. No one is interested on ebay, so where should I go to sell old Nitropad’s?

(basically brand new)

Maybe this could be a place to make an offer: https://moneromarket.io


Cost around $750 so ideally looking to recoup as much value as possible. Open to offers though