BetterBasics via Amazon offers the Sterline Sonic Electric Rechargeable Toothbrush for $29.99. Coupon code "4TOOTHBR" cuts it to $22.49. With free shipping, that's the lowest price we could find by $3. It features three replacement heads, three brushing modes, 31,000 brush strokes per minute, and an automatic timer. Deal ends September 23.