if you be look for adjustable dumbbell then you know the price vary but hover around $ 300 for a set . the powerblock be the best . I just start p90x 2 week ago and i have to change weight so quickly these thing be awesome ... in\/n\/out , 5 seconds later i be ready to go with a new weight and talk about space-saver ; OMG these thing take up no room at all . they be pricey but you will not regret you purchase unless you leave they sit around to get dusty : -rrb-