Overpriced to who? PC owners who upgrade this and that every 2 months end up spending more than they would on a mac anyway!
My 733 G4 PowerMac is going strong 4 years after it's purchase, every release of OS X has further increased the life of the machine by providing a speedboost, the same cannot be said of my 2 years old athlon 2200 which is creaking and groaning, and I only ever turn that piece of crap on about once or twice a year!
What I find amusing is that my G4 quicksilver still sells for about £200 secondhand whereas I'd be lucky to get £20 for the athlon system - despite being 2 years younger!
My best buy is my Powerbook G4 which does everything I could ever want and I know that'll it continue to do that for many years to come. I've got that smug feeling that I didn't go down the Microsoft route.