I'm looking to buy an adjustable dumbbell set (two dumbells), preferably one that reaches up to 100 lbs. 50- 75 lbs dumbbell set is okay too. Anything that is of reasonable price range. I checked walmart and sears and they sell them for way too much. Does anyone have something more affordable or used? Any brand will do, Weider Pro, Bowflex, etc. I'm tired of having to put down the weight, add or removing the plates and spin locks. It's such a hassle. Want to keep the pump going. It feels like its taking me another hour just to finish my workout.