Target offers the Philips Sonicare 3 Series Gum Health Electric Toothbrush, model no. HX6631/02, for $69.95. Clip the coupon on the page and apply coupon code "TGTA39R9" to cut that to $54.95. With free shipping, that's the lowest total price we could find by $5. It features three intensity settings, purported battery life of three weeks, and up to 31,000 brush strokes per minute.