On Amazon where you can now buy this
Lodge Seasoned Cast Iron 5-Quart Double Dutch Oven 处理好的铸铁锅打折后 for just $31.92 shipped (regularly $64).

This cast iron dutch oven has a lid that can be used as a skillet, or use it as a cover for roasts and bread! The cast iron is already seasoned with 100% vegetable oil so you can start cooking with it right away. Plus, it offers heat retention and even heating throughout the dutch oven.