On a wider scale, "overpriced" is determined by the market, and I'd like to see someone conclusively prove that Apple computers are priced higher than the market is willing to pay.
That is... not at all true. What? People are willing to pay for all sorts of overpriced shit, which is one of the reasons why things get overpriced so readily in the first place. Until people aren't willing to pay for it, there's little incentive to drop prices, and when you're effectively offering something people can't really get elsewhere, you're free to overprice your shit as much as you like until you find a breaking point.
If you really want an apple instead of an orange, and I'm the only guy who can sell you an apple, the fact that your craving for apples leads you to pay a 300% markup doesn't mean I'm not selling you some wildly overpriced shit. It just means you were really in the mood for an apple so were willing to put up with my bullshit to get one.
Hell, sometimes overpricing something is a goddamn business strategy. Convince enough people that something is way more awesome than it is and jack up the price according to your expectations of how gullible they are.