Consider going to Costco. I think my Dad pays around 500 CAD for his set. They would likely cost more than double at other places. The service at Costco is great as well.
Also, as other people have said, they are expensive because they are technologically advanced and expensive to manufacture. You can build some kind of hearing aid for less than $100 but it will not compare with a $500 one.
Also, as other people have said, they are expensive because they are technologically advanced and expensive to manufacture. You can build some kind of hearing aid for less than $100 but it will not compare with a $500 one.