The cost of a pair of dumbbells can vary widely. It depends on many factors, including how much the dumbbell weighs, the material that it’s made of, whether it comes with other exercise equipment or accessories (storage trays, one-handed adjustment dials, etc.), and more. For example, a simple 3lb dumbbell at Walmart can cost just under $10, while more innovative dumbbells with different weight options and features like the FitRx SmartBell cost just under $100. Just about any pair of dumbbells can provide a great workout, but a smart dumbbell can help you enjoy even more convenient and effective training right at home.