Walmart offers the Black & Decker Matrix 20-volt Max Cordless Drill, model no. BDCDMT120, for $49.02 with free shipping. (Amazon charges the same for Prime members; while Target charges a buck more.) That's the lowest total price we could find by $23, although we saw it for $9 less last winter. (For further comparison, we saw it bundled with a flashlight kit for $50 shipped in July.) It features a lithium-ion battery and charger and adjustable rpm from 0 to 800.