Amazon has the Denali 565034 18V Cordless 1/2-Inch Hammer Drill for $14.38 and it's eligible for Free Super Saver Shipping on orders over $25 or with Amazon Prime.
This is just the drill, no battery pack. The 18 volt Battery Packs are only $9.45 if you don't already have some. Or you could get the drill, with the battery pack and some filler to get the free shipping.
Amazon has some Drill Bits that would make nice filler for this deal
* Denali 18-Volt Cordless 1/2-Inch Hammer Drill with a high performance 2-speed motor (0 to 450/0 to 1300/min)
* Delivers 203 ft./lbs. of torque; 24 torque settings; 360 degree rotating battery pack
* 1/2-inch Jacobs keyless chuck; power indicator lights up when switch is on; over-molded soft grip for comfort
* Includes two screwdriver bits with on-board storage
* Powered by Denali 18-Volt Cordless Battery Pack (not included); 1-year warranty