Seagate Momentus 500GB 5400RPM SATA Internal Notebook Hard Drive for $49.99 shipped.  Here is a screenshot for reference.   Alternatively, it is available at TigerDIrect for $49.99, plus $2.29 shipping for a total of $52.28 shipped. This laptop drive features 5400RPM, 8MB cache and SATA 3.0Gb/s.  Note that it comes in OEM packaging, which means [...]