Staples offers the Hefty 30-Gallon CinchSak Drawstring Trash Bag 60-Pack for $9.99. Coupon code "69586" cuts it to $8.50. Plus, Staples Rewards members bag free shipping. (Not a member? It's free to join.) That's $0.14 per bag and about $4 less than you'd pay for this quantity of bags in stores.