>If I do want to sell someone a car, I can specify a contract or license that they must follow if they buy my car. Only in a limited form e.g. exhaustion doctr

>If I do want to sell someone a car, I can specify a contract or license that they must follow if they buy my car. Only in a limited form e.g. exhaustion doctrine prevents you from restricting resale. If someone wants to resell their exclusive Ferrari, there's nothing Ferrari can legally do (though this'll probably get you blacklisted from ever receiving an exclusive vehicle). In general, terms can't go against existing laws and have to be 'conscionable' to be enforceable (i.e. they can't be obviously 'unfair').