Philips Sonicare Essence Sonic Electric Rechargeable Toothbrush for $11.95 after clipping a $13 off coupon. Shipping is free on orders over $25 before the coupon code. In other words, it is just $0.05 shy of free shipping. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. It supposedly removes up to 2x more plague than a manual toothbrush. Most places have it for about $24.