First generation four cores with a decent amount of RAM still fetch $1000 easily. It's kind of insane people still want that kind of money for it considering the huge difference in performance of them vs the new current machines. For example the base model original Mac Pro scores about 3700 and a current base model will hit around 8800 in Geekbench. I know Geekbench numbers do not mean everything, but its gives you an idea. Besides the fact that its old, slow (in comparison) and used, it's also out of warranty and incredibly expensive to repair. If I was going to spend that much on a machine I'd rather just buy new and enjoy the benefits of a warranty and modern technology.