RichieTee
Member
First things first: You likely WILL NOT GET TO KEEP THE LUDICROUS UPGRADE.
Tesla are jerks, and anything that is a software upgrade is likely to be stripped out by them remotely when the car transfers to a new owner's account. So don't pay extra for that, you and the previous owner are about to lose that money. Tesla says "thanks for that free money" for the feature rental.
This is untrue. It only gets stripped if it's traded or sold back to Tesla. If it goes from private seller to private seller without ever getting traded back into Tesla, it does not get stripped.