While I agree with the sentiment for physical objects it doesn't apply to things connected to the Internet. An old "smart" TV may have no resale value whatsoever but that doesn't mean it has no value from an attacker's perspective.

From the attacker's perspective something like a connected smart TV has extremely high value as a mechanism for further penetrating a network. Black boxes that no one can login to under normal circumstances are the perfect secret strongholds to maintain a persistent presence on any given network.