Amazon offers the Philips Sonicare 3 Gum Health Sonic Electric Toothbrush, model no. HX6631/02, for $59.95. Clip the $10 off on-page coupon to drop it to $49.95. With free shipping, that's $5 under our mention from Black Friday week and the lowest total price we've seen. (Excluding the mention below, it's the best deal now by $31.) It features three intensity settings, purported battery life of three weeks, and up to 31,000 brush strokes per minute.
A close price: Walmart offers it for $59.95 bundled with a $10 Walmart gift card.