The cost of a brake rotor replacement in the US can vary depending on several factors, including the make and model of the vehicle, the brand and quality of the brake rotors, and the location where the service is performed. On average, the cost of replacing a single brake rotor ranges from $100 to $300, while replacing a full set can cost anywhere from $300 to $800 or more. To find the cheapest place to get brakes done, it is essential to shop around and compare prices from different auto repair shops and service centers. Local independent mechanics and discount tire and brake centers are often good options for finding more affordable brake rotor replacements without compromising on quality. Additionally, consider looking into online auto repair platforms, as they may offer competitive pricing and the convenience of comparing quotes from multiple mechanics to ensure you get the best deal.