I have found a GREAT store bought Kettlecorn by Popcorn, Indiana. It is just as good or better than the Kettlecorn found at ball games and fairs. I bought mine at Wal-Mart for only $2.50 for 10.5 oz. This is a great savings over the $6 a bag at ball games and fairs.
http://www.popcornindiana.com/