Stock pots vary in price, depending on their size and material. Although aluminum is often cheaper than other materials and conducts heat well, look for a pot that is made of, or at least layered with, stainless steel or another nonreactive material that will prevent acidic foods and ingredients (read: tomatoes) from picking up metallic flavors from the pot.
Stock pots can be found at specialty cooking and department stores, as well as online. Prices range from $15 to $400 and more.
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