Lead testing can be expensive, depending on the method used and the number of samples taken. The most common methods are X-ray fluorescence (XRF) and atomic absorption spectroscopy (AAS). Both of these methods require special equipment and trained personnel, so the cost can add up quickly.
XRF is typically the more expensive of the two methods, due to the high cost of the equipment. AAS can be less expensive, but still requires specialized equipment that may not be widely available. In either case, taking multiple samples will increase the cost further.
There are some ways to reduce the cost of lead testing, such as using a home test kit or sending samples to a laboratory for analysis. However, these methods may not be as accurate as XRF or AAS, so it is important to weigh the costs and benefits before deciding which option is best for you.