Amazon offers its Prime members the Lodge 10" Pre-Seasoned Cast-Iron Chef's Skillet, model no. LCS3, for $14.97 with free shipping. (Non-members can spend over $35 for free shipping; it otherwise adds $7.99.) That's the lowest total price we could find by $7, as well as the cheapest 10" skillet we've seen. It's oven-safe and can also be used on grills and over campfires.