Walmart offers the Farberware 13" Nonstick Bakeware Pizza Crisper, model no. 52113, for $5.65. (Home Depot has for the same price in-cart with free in-store pickup.) Opt for in-store pickup to avoid the $5.97 shipping fee. That's the lowest price we could find by $4, although we saw it for a buck less last November. It is made of carbon steel and is oven safe up to 450 degrees.

Update: The price at Walmart has increased; however, the price at Home Depot is still $5.65 with in-store pickup.