Costco has BLACK Philips Sonicare DiamondClean Brush Heads w/$10 off! ($40/6pk) Thumb Score: +1 Black brush heads never go on sale at Coscto, my friends, and are rarely on sale otherwise, except… now! 6pk for $ 40 [costco.com] (looks like the white ones are OOS) Slickdeals Hot Deals Forum