Mushkin Enhanced Chronos Deluxe MKNSSDCR240GB-DX 240GB Solid State Drive for $159.99 shipped.  Note that a 2.5"-3.5" adapter is included.  Here is a screenshot for your reference.  Alternatively, it is available at Amazon for $159.99 shipped.  It features RAID and TRIM support, up to 560MB/s read speed, 520MB/s write speed, and uses SATA III interface.