MegaMacs offers the refurbished Apple Mac Pro Xeon 8-Core 2.8GHz Workstation, model no. MA970LL/A, for $499.99 plus $2 for shipping. That's $490 under our August mention and the best price we've seen for this 8-core workstation. It features two Intel Xeon 5300 Series 2.8GHz quad-core processors, 4GB RAM, 1TB hard drive, ATI 2600XT 256MB graphics, and Dual Layer SuperDrive.

Note: An OS is installed on this system, but it's unclear which version. A 30-day MegaMacs warranty applies.