Scarcity
Demand and supply is a basic concept of economics. High demand and low supply equals higher prices. For a manufacturer there can be nothing better than a perception of scarcity about a product they are making; a limited edition, short time only, one off deal. Better get it while you can. Elite private schools use this perception of scarcity to their advantage too. Hell, their entire business model is built around their clients desire be part of an exclusive club. They limit t