What is the price of dumbbells you care about? The answer varies widely, as the price of adjustable dumbbells is primarily determined by the weight of the adjustable dumbbell.
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Beginner:
If you're a beginner, it's best to look for lightweight adjustable dumbbells. At 25 pounds per dumbbell weight, most lightweight adjustable dumbbells can be adjusted from 5 pounds to 25 pounds in 5-pound weight increments. Many of the 25-pound adjustable weights are sold individually, but he always recommends buying two to get the most out of your workout. You can do compound exercises with two dumbbells. Compound exercises increase muscle mass, build strength, and burn fat faster than other types of exercise.
Intermediate lifters:
Intermediate lifters may consider the heavier 50-pound adjustable dumbbells.
If you've had peace of mind for a few months, or if you're a beginner and thinking of starting your journey with a heavier pair of bells? Is possible. As you can imagine, 50 pound dumbbells are more expensive than 25 pound dumbbells. Because it doubles the weight.
The 50 lb dumbbell set is perfect for most level lifters except experienced lifters.
It's unlikely you'll start building 50-pound dumbbells anytime soon. So, investing in a 50-pound dumbbell will keep you lifting for years.

Interchangeable dummy with adjustable selection mechanism from 5 to 50 lbs. $280 to $330. A set of screw torques in the same weight range can be purchased for $105-$145. A pair of adjustable dumbbells is much cheaper than a full set of dumbbells of the same weight.