Factory Authorized Outlet via eBay offers the refurbished DeWalt 20-volt MAX Lithium Ion Hammerdrill / Impact Driver Combo Kit, model no. DCK290L2R, for an in-cart price for $179.99 with free shipping. That's the lowest total price we could find by $40 for a refurb elsewhere. It features a 3-speed transmission, 1/2" ratcheting chuck, and three LEDs.

A 1-year warranty applies, but it's unclear who backs it.