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Amazon.com: Seagate 500 GB Pipeline HD SATA 3Gb/s NCQ 8MB Cache 3.5-Inch Internal Bare Drive (ST3500312CS) : Electronics
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Amazon.com: Western Digital AV-GP WD5000AVDS 500GB 32MB Cache 5400RPM SATA II 3.0Gb/s 3.5 Internal Hard Drive (CCTV DVR, PC, Mac) (Renewed) : Electronics
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Amazon.com: Western Digital Blue WD5000AZLX 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive : Electronics