Well, if you look at it from Apples standpoint, that's a pretty good deal if it cost 450$ish in parts. It should have options to change the video card and cpu, but I guess it's another way for Nvidia to liquidate their stock of old 8800's.

An Apple Mac pro with a single quad xeon, 3gigs ram, 640gb hd, a superdrive, and a NVIDIA GeForce GT 120 with 512MB is 2500$ base price. Now that is absurd.