Walmart offers the Lodge 6-Quart Enameled Cast Iron Dutch Oven in Oyster White for $49.45 $49.88. It falls to $39.25 when you choose in-store pickup. (Amazon charges the same.) That's the lowest price we could find by $8, although we saw it for $2 less in June. It's oven-safe to 500°F.

Update: The price has dropped to $37.69 with in-store pickup.