Craftsman 11818 Nextec 12-Volt Cordless Hammerhead Auto Hammer for $42.49.  Order online for in-store pickup at Sears to lock in the price and save on shipping.  Otherwise, shipping is $8.25 for a total of $50.74 shipped.  Here is a screenshot for your reference.  This cordless auto hammer drives both finish and common nails flush up to 3.5" long, removes nails, and features 3600 beats per minute, a magnetic head, and LED work light.  Most places have it for about $79.