DeWalt DC759KA 18-Volt 1/2" Cordless Drill Driver for $140 shipped.  Here is a screenshot for your reference.  It is relatively lightweight at 5.2lbs and delivers up to 380 unit watts.  Other features include a dual-speed range and a 1/2" single sleeve keyless ratcheting chuck.  This package comes with a one-hour charger, two 18-Volt batteries, a double-ended screwdriver bit, and a kit box.  As a comparison, Lowe's has it for $173.