DailySale offers the Pursonic S450 Deluxe Sonic Toothbrush for $48 with free shipping. That's $2 below our mention from last fall and the lowest total price we've seen. (It's a current low by $2 although most stores charge over $60.) It brushes at 30,000 strokes per minute and includes 12 extra brush-heads and UV sanitizing chamber.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.