Tungsten needles can be more expensive than other materials commonly used for similar applications, such as stainless steel or brass. This is because tungsten is a rare and dense metal with high melting and boiling points, making it difficult to extract and manufacture. Additionally, tungsten has unique properties that make it ideal for specific applications, such as high-temperature stability and high wear resistance, which can justify the added cost. However, the actual cost of tungsten needles can vary depending on factors such as the size, shape, and quantity needed.