Are residential elevators overpriced?

From what I have been told, and the minimal research I have done, it looks like residential elevators cost an average of $25,000 istalled. I have to wonder what type of profit they are making on that? Since this is a newer thing people are adding to their home, and from what I understand sometimes you can get a tax write off if it is necessary for medical reasons, I am just wondering if the price is very high now, but will eventually come down as more competition comes into the market.

So, I am interested in whatever you know about residential elevators regarding cost.

Thanks.