Utopia Deals via Amazon offers Prime members the Utopia Kitchen 12" Cast-Iron Shallow Concave Wok, model no. UK0044, for $19.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $10.11.) That's $30 off list and the lowest total price we could find. It's designed for all cooking surfaces as well as grills and campfires.