You're question doesn't really bring anything to the table. Who sets the price? I have no idea, but to hazard a guess, I would say the owner of the site does, with a commission fee to the registrar to list it as available.
Does this help me fix my server that's blue screening? Not really. Instead of subjective and argumentative, I would say off-topic. But regardless, not a question that needs to be asked here. Even if you go to GoDaddy, they have a link specifying what a Premium Domain is, which is a domain they list which is owned by a 3rd party.