Walmart offers the Amish Country Popcorn Popcorn 2-lb. Bag 8-Pack in Medium Yellow for $18.24 plus $4.97 for shipping. That's $1.45 per lb., the lowest total price we could find for this quantity by $13, and a strong offer for this quantity of popcorn.

Update: it's also available in Medium White or Rainbow Blend for the same price.

Update 2: The price has increased to $18.45 $18.80.