It's actually a bit surprising that the Apple Mac computer phenomenom still continues. After all these years of having a relatively small user base it says something about the "useability" of Apple's computer products that they're still around. There's always been something that's a bit counter-revolutionary about being a Mac user. And they've long been favorites of those who use their PC's for various artistic endeavours - such as graphical artists and photographers. The software that made Macs the choice for artistic work can now be found on Windows-based PC's, but you'd have a hard time getting most long-time Mac users to make the switch.
For many years buying a Mac meant paying a significant premium above an equivalent Windows PC. Macs are still a little more expensive than a "regular" PC, but the gap has been closed as Apple moved to more easily available (and cheaper) processors. Enjoy your search for the best deals on your next iMac, eMac, iBook or G4.