Value is always in the eye, and mind, of the customer. There is a market for virtually everything. A company trying to sell a product has to decide what market they are going to target and price their merchandise according to what they believe that target market is willing to pay. Apple, through all the means at its disposal, has been able to persuade a sizable market that there is value in many of the products they sell equal to the prices they charge (not all - remember the Lisa). The goal price for any product is just below the price that discourages purchase by the target market. If sales volume meets or beats the goal (lots of people buy it), then they priced it well.