Amazon cuts an extra $1 off a selection of Crest toothpaste this clippable coupon. Plus, get an extra 5% off and free shipping when you place your order eligible items via Subscribe & Save. A couple best bets, with prices after both of the above discounts and compared to what you'd pay in-store at Walmart: Be sure to cancel Subscribe & Save after your order ships or you'll be billed for subsequent shipments.