Basic concept of supply and demand. There was limited supply and high demand, therefore the price was high. Now that demand has diminished some and supply has increased, the prices drop. In order to maintain volume, Apple dropped the price. Apple is not the only company to do this, its quite common. Most people just don't understand this basic economic concept. By the way, gas prices work the same way.

Quit your bitching, you paid the price that Apple was asking.