8-Pack Sonifresh Sonicare Brush Heads | $7 | Amazon | Clip the $7 Coupon

At $14 for an 8-pack, these third party Sonicare DiamondClean brush heads are already way cheaper than the real ones. But when you clip the $7 coupon on the page, you can get them for less than $1 each, which is unheard of.