2F110A-300 – Seagate 500GB 7200 RPM SATA 3.5″ HDD – Disk Drive Finder
Amazon.com: Western Digital Blue WD5000AZLX 500GB 7200RPM 32MB Cache SATA III 6.0Gb/s 3.5in Internal Desktop Hard Drive [Renewed]- w/ 1 Year Warranty : Electronics
Amazon.com: WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM SATA 6 Gb/s 16MB Cache 3.5 Inch - WD5000AAKX : Electronics