Kingsford Charcoal 18.6 lb (2-pack) $7.66 Home Depot
My local Home Depot is clearancing two-packs of 18.6 lb Kingsford Original Charcoal for $7.66. I added a picture of my receipt, just to be clear I purchased 2x of the two-packs (4 total 18.6 lb bags) for $15.32 after tax.
I forgot to take a picture of the HD clearance tag but the Brickseek link is below. Looks like most stores still have plenty in stock.