For in-store pickup only, and with stock varying by ZIP code, Advance Auto Parts offers the Road Runner Ice Melt 20-lb. Bag for $6.29. Better yet, add four bags to your cart for $25.16 and apply coupon "WD46" for a final price of $15.16. That's tied with our March mention and the lowest total price we could find by $9. It melts to -15°F. Coupon ends November 15.