Walmart offers the CAP Barbell Neoprene Coated Dumbbells in a variety of weight options, with prices starting at $1.97. Choose in-store pickup to avoid the $5.99 shipping charge. That's a buck off and the lowest price we could find. These dumbbells are made of solid cast iron with neoprene coating. They're available in a selection of weights from 2 to 10 lbs.