This deal has ended.
Through 8/31, Drugstore.com has marked down the Sonicare Advance 4100 Power Toothbrush to $49.99, $20 off retail price. Better yet, new Drugstore.com customers can activate this coupon for $5 off $30 or $10 off $50, plus free shipping. Assuming you make another small purchase (ie: a bar of soap) and can use the $10 off coupon, you'll get a Sonicare toothbrush for only $39.99 shipped. Plus, there is no sales tax (except WA).