I went by my Home Depot and they didn't have any on sale.
I went to Wal-Mart and picked up 2 2-packs (5.49).
I went by Lowes and they had some 2-packs, but didn't even have a price on them. Right next to the 2-packs, they had single 20 pound bags for 9.99. I guess the Tucson stores didn't get the memo.