Sorry to hear that you're experiencing a rough time.
the H9 that you max'd out, will always be a Max. The buyer will be getting a Max but you'll need to deregister it. Your other H9, the Core I presume, will be sold as a core. It also must be deregistered so that the new owner can register it.
the algoritms that you purchased to max out will stay in your account so, if you buy a Core or standard H9 in the future, those algoritms will work on it.
