If you are selling secondhand you may delete the hardware serial from your SSL account.
Please note 4K B and Meter bundled with hardware are non-transferrable.
Additional bundled software, such as the Production Pack, is non-transferable and available to the original owner only.
SSL is not able to transfer software for secondhand units nor revoke any activated iLok licences.
Regarding UC1 please see Secondhand UC1.