Walmart offers the Cap Barbell Vinyl Kettlebell in Black in various sizes, as listed below. Opt for in-store pickup to avoid the $4.97 shipping charge. The sizes:

• 5-lbs. for $5.26 (same at Amazon via add-on, low by $3)
• 10-lbs. for $9.66 (low by $1)
• 15-lbs. for $12.87 (low by $5)
• 20-lbs. for $15.39 (low by $1)