Amazon has the 4-Pack SENSODYNE PRONAMEL Breath Enamel Toothpaste for Sensitive Teeth (4oz each, Fresh Wave) for $21 - 30% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $14 with free shipping on $35+ or with Prime. $2.61 per tube.

Also on sale: 3-Pack 4oz Sensodyne Pronamel Daily Protection Enamel Toothpaste are $10 w/ S&S & coupon