alt Hacker NewsWell, materials seems to be very common, and indeed even if they are precious alloys to be lighter it's still a very high price. Research have to be payed of course, but again you can sell a product, no more than that.
I've heard many time about "special design", "this price is really right" and so on, all the time it was wrong. Oh, that does not means it's a bad product, it's simply overpriced and the price might even be right seen their expenses and resources, but it's still too much for a market who offer other very similar product at a much little price.
An idea alone does not suffice.
I've mentioned in other comments the difference between "hospital" style wheelchairs and full time use wheelchairs used by people with spinal cord injuries or other mobility issues. Full time wheelchairs are 1/3 or more lighter than the hospital style, more rigid which makes pushing more efficient, more comfortable, and easier to maneuver.
You cannot compare these wheelchairs to what you might sit in at the emergency room, as they are for different use cases and fill different needs. These wheelchairs aren't for "oh I broke my leg and have to use a wheelcahir for a few months". These are for "I will be spending 14+ hours a day in this chair."
Please do some research about rigid frame wheelchairs before saying you don't see how this is a big deal. Companies like TiLite and Quickie START at almost double this price point for similar products.