When selecting a new black basin mixer tap, you should consider many factors, including your needs. You should know what features your new faucet should have and whether it will be a pullout or pot filler faucet. Obviously, you should also consider cost, as a professional will charge more than if you were to install it yourself. Additionally, the cost can vary depending on the material, finish, and brand of the faucet. In addition, high-end faucets may cost more than standard models.