I found one on eBay for $60!! The Seller claimed that it wouldn't boot. I took a chance and bought it and surprise, surprise, it booted up when I received it. It come with a 80GB HDD, BlueTooth, Airpot Wireless card, and OS X 10.4.
I am going to set up a dual boot with MorphOS but not sure how much is really recommended for MorphOS. Is 20GB OK?