I can't speak for Home Depot stores everywhere, but the one near my home sells a twin-pak of 13lb Kingsford for $5.49 every Easter, Memorial day, July 4th, and Labor day - no limit! That's about $2.75 per bag! They used to sell two 20lb bags for this price up until about 2 years ago then they switched to the 13lb bags. Wal-Mart and Target usually get in on the price war and match this. So for now it's plentiful and cheap. I usually buy a pallet in the spring.