Amazon offers Prime members the Cap Barbell 30-lb. Enamel Coated Cast Iron Kettlebell for $26.70 with free shipping. (Non-members can spend $49 to qualify for free shipping; otherwise, shipping costs $17.85.) That's $3 under our January mention and the lowest total price we've seen. (It's the best now by $9.)

Also available is the Cap Barbell 50-lb. Enamel Coated Cast Iron Kettlebell for $44.50 with free shipping. (As above, non-members can spend $49 to qualify for free shipping; otherwise, shipping costs $24.15.) That's $5 under our November mention and the lowest total price we've seen. (It's the best now by $18.)