This is kind of like asking, "what is water worth?"
To an upper middle class person in the developed world, a dollar or two. To a person stranded in a desert, they might literally kill for it.
If you are just a Joe shmoe out in the world living a basic life, privacy might not be worth hardly anything. But if you're a whistle blower or a political dissident in an authoritarian country, your privacy is worth everything.