Amazon offers the Hefty Slider 1-Gallon Storage Bags 80-Count Pack for $6.39 with free shipping via the directions below. That's $0.08/bag and about $2 under what you could expect to pay in local stores for this quantity. To get this deal:

1. View the Hefty Slider 1-Gallon Storage Bags 80-Count Pack for $7.99
2. clip the 15% off coupon on the product page
3. add it to your cart via Subscribe & Save for a final price of $6.39