The price of US residential proxies varies by provider and depends on several factors, such as the quality, stability, and speed of the proxy IP, as well as the provider level of service and support. Typically, the cost of US residential proxies can range from a few dollars to several tens of dollars per IP address per month. However, it is best to compare prices and features of different providers based on your specific needs and budget, and choose the best solution that fits your requirements.