Walmart offers the Oral-B Professional Healthy Clean + Floss Action Precision 5000 Electric Toothbrush, model no. 10069055856854, for $79.99. This $25 mail-in rebate cuts it to $54.99. With free shipping, that's $21 below our July mention and the lowest total price we've seen. (Aside from the mention below, it's a current low by $58.) It features a wireless SmartGuide, 40,000 pulsating movements per minute, and five brushing modes.
Don't want to deal with rebate hassles? Amazon sells this toothbrush for $64.99 with free shipping when you clip the $20 coupon on the product page.