Lockergnome has a nice article on comparisons of the cost of a leading brand PC to the Mac Pro. The comparisons are to HP and Dell systems. Mac Pro is the high end Apple offering.
Now that you see the reason of Apple’s pricing, let’s move onto ownership. One big difference between a Mac and PC is the life they have during ownership. After you get a Mac, you might start realizing that the cost you paid for it will soon save you much in your wallet. The first thing you will come to notice is the software. Software on the Mac side is normally cheaper. I believe that the amount of software you buy for your computer can eventually equal or surpass the cost of the computer. Well this is just one reason why a Mac can save you money.
Interesting discussion on cost of ownership. Might be worth a thought when you are ready to purchase a new system this holiday season.