Walmart offers the Ozark Trail 3-Piece Plant Oil Cast Iron Skillet Set with Griddle for $17.99. Opt for in-store pickup to dodge the $5.99 shipping fee. That's the lowest price we could find by $12, although we saw it for $6 less last year. The set includes two plant oil pre-seasoned pans measuring 8" and 5", and a griddle measuring 6" x 5" x 10".