The average cost of a large cast-iron kettle is about $45. You can spend much more or less than that depending on the exact size and weight of the kettle, its brand and its age.
Cast-iron tea kettles are popular for many reasons. They can withstand high heat, are nontoxic, are resistant to rust and come in many shapes. Most cast-iron kettles are black, but other colors are also available to match kitchen decor. Many consumers claim that the water from cast-iron kettles tastes fresher and cleaner than from kettles made of other materials, which makes cast-iron kettles popular with tea-lovers.