DeWalt 18v 1/2" Cordless Drill Driver, Plus 37-Piece Driver Set for $109.99 shipped.  It is sold through ebay by factory_authorized_outlet.  Here is a screenshot for reference.  This drill/driver weighs 5.2 lbs. and features a 380-watt motor, dual speed range, 1/2" single sleeve keyless ratcheting chuck, and the set includes 2 batteries, a charger, a double-ended screwdriver bit and a heavy-duty storage box.  Most places have it for about $159 without the driver bits set.