The price range of activity tracker watches in the market varies widely depending on the brand, features, and quality. Generally, you can find basic activity trackers starting at around $20 to $50. Mid-range options with more advanced features, such as heart rate monitoring and GPS functionality, typically range from $50 to $150. Premium or high-end activity tracker watches, often with additional features like smart notifications, music control, and a variety of sport modes, can range from $150 to $500 or more. However, it is important to note that prices are subject to change and may vary depending on sales, discounts, and the specific model you are interested in.