Kmart offers the Essential Home 3-Piece Cast Iron Fry Pan Set, model no. TTU-U0305, for $9.99 with free shipping. That's the lowest total price we could find by $7. It includes 6.5", 8", and 10.5" pans.
Of note, Shop Your Way Rewards members will earn a Kmart credit with this purchase and may be eligible for additional credits and discounts.