Seagate Barracuda ST2000DM001 2TB 7200RPM Internal Hard Drive for $99.99.  Here is a screenshot for reference.  This drive features 7200RPM (much faster than 5400RPM drives), 64MB cache, and 2TB/platter design.  It comes in OEM packaging, which means no pretty retail box but is otherwise identical.  Most places have this hard drive for about $119.