Seagate Barracuda 7200.9 Hard Drive - 300GB - 7200rpm - 300MBps Serial ATA - II - Serial ATA/300 - Internal $122.99

The Seagate Barracuda 7200.9 with SATA 3Gb/s and Native Command Queuing (NCQ) adheres to the SATA specification and is the industry's most comprehensive 3.5-inch drive, providing leading technology targeted at SATA servers, mainstream and high-performance PCs/workstations, PC gaming systems and media PCs.

Buy.com is carrying this 300GB Internal Hard Drive for $122.99