Amazon has the Oral-B Pulsonic Sonic Rechargeable Electric Toothbrush, model no. S15-1, for $24.50 (69.99 – 21.00 instant savings – 50%  MIR) with Free Shipping for a limited time. The 50% mail-in-rebate expires September 15, 2011.

Experience Sonic technology in our slimmest form from Oral-B. This attractive electric toothbrush is slimmer than Sonicare® Essence and designed to naturally whiten your teeth by gently polishing away surface stains. Plus, Oral-B Pulsonic removes more plaque than a regular manual toothbrush with a dynamic bristle cleaning action. You can even customize your routine to your unique needs with Clean and Sensitive brushing modes. The subtle two-minute timer helps you reach the dentist-recommended brushing time. With Oral-B Pulsonic, you’ll get all the benefits of today’s Sonic technology with Oral-B’s trusted satisfaction guarantee.