These Crest 3D White Whitestrips Professional Effects Teeth Whitening Strips drop from $54.99 to $39.99 at Drugstore.com. This $10 mail-in rebate drops them to $29.99. Click the checkbox on the product page to use the $7 coupon as well, dropping the price to $22.99. Plus, shipping is free over $25 (so these will ship for free since your price will be $32.99 before your rebate shows up), and if you spend more than $50 on Proctor & Gamble products like this (ie- if you buy two boxes of these strips) you will get a $15 Visa card in the mail. Just check the box for that on the product page as well. New customers can also use code 195176A2 to get $5 off $30 or $10 off $50. There is no sales tax (except IL, NJ, NY and WA).