I buy my kettlebells from IQI - www.iqihub.com. Recently bought vinyl coated cast iron 6kg + 8kg kettlebell set for £26.99. I challenge you to find cheaper decent kettlebells anywhere else! They basic bells, but decent quality & tough enough for regular use. These different weight sets are handy too for a bit of versatility in your workout, or you're not sure how much weight you can handle. Get shopping.