Bowflex SelectTech 552 Dumbbells for $299.00 shipped. Here is a screenshot for your reference. Alternatively, it is available at Amazon for $299.00 shipped. Each dumbbell adjusts from 5 to 52.5 pounds. This dumbbell set combines 15 sets of weights into one and eliminates the need for multiple dumbbells. Most places have this dumbbells for about $349.