Amazon has the 40-Pack 39-Gallon Amazon Basics Lawn & Leaf Drawstring Trash Bags for $12.20 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $8.54 with free shipping on $35+ or with Prime. Roughly 21 cents per bag.