Amazon has the PORTER-CABLE 20V MAX Impact Driver Kit w/ Two Batteries (PCCK647LB) on sale for $79 with free shipping.

Includes (1) PCC647 Impact Driver, (2) PCC680L 20V MAX* Lithium Ion 1.5Ah Batteries, (1) PCC699L Compact 1 Amp Charger, and (1) Screwdriving Bit.