Western Digital Caviar Green 1TB 64MB Cache Internal Hard Drive for $49.99 shipped.  Here is a screenshot for reference.  This is part of WD’s GreenPower lineup, which reduces energy usage.  It features 5400 RPM, 64MB cache and uses SATA 3.0Gb/s interface.  Note that it comes in OEM packaging, which means no pretty retail box but is [...]