Walmart offers a selection of Cap Barbell Vinyl-Coated Dumbbell Pairs in a variety of weight options from $2.06. Choose in-store pickup to avoid the $5.99 shipping charge. (Select weights also receive further discounts when you choose pickup.) A couple of best bets, with prices after choosing pickup: Note: Single dumbells are also available, but most have a higher per-unit price. (Some actually cost more than the pair price.)