This Desktop PC

Today only. Newegg.com has the Refurb: HP MediaSmart EX485 Windows Home Server W/Celeron 2.0GHz, 2GB RAM/750GB HDD for $289.99 with free shipping.

Product description from Newegg.com:

Main Brand HP Series MediaSmart Model EX485 Type Tower Processor CPU Type Intel Celeron 2.0 Ghz Memory Installed Memory Size 2GB Memory Type DDR2 Storage Hard Drive (Installed) 750GB HDD Interface SATA Networking
LAN Ports 1x Ports Physical Spec Dimensions 5.5″ x 9.8″ x 9.2″ Features Features Powered by Microsoft Windows Home Server software
Network-based backup of Macs using Apple?