It's very expensive.

I think Apple is using the same method airlines use when selling seats, just in reverse. Airlines start selling seats cheaper at the beginning, and as there are fewer and fewer seats, the price increases. Apple, on the other hand, is selling at a premium price for a new product category, and I believe it is, so they can get away with it for some time, and they will lower the price as they sell more. This has nothing to do with economies of scale. They already own the premium portion of the mobile phone market.

Something less available is worth more. Those who own it now can enjoy people's attention and their curious inquiries, which are worth more than money can buy for some people.