apples are a bit more expensive than pc's.. good mid priced off the shelf pc from walmart run you 400 without the screen speakers keyboard or mouse. Pretty good system with a warranty... and if ya's don't like it, walmart will take back anything.
It used to be true that Apples didn't suffer from any of the virus/spyware/malbug problems that a PC does but recently there was a story on the news how some hacker got past this on the Mac system. Macs are still a TON more secure than the PC though. But yes, they are a definately pricier!