Amazon offers the Philips Sonicare ProtectiveClean 4100 Plaque Control, Rechargeable electric toothbrush with pressure sensor, Black White HX6810/50 for $29.95, free shipping.
Removes up to 7x more plaque vs. a manual toothbrush
Pressure sensor protects teeth and gums from excess brushing pressure
Always know when to replace your brush head for an effective clean with Brush Sync replacement reminder
Quad pacer and Smart timer helps ensure dental professional recommended 2 minute brushing time and encourages brushing in each quadrant of the mouth
Batter charge indicator light let's you know when to recharge; 2 week battery life