That's really cool. But I also notice that when I go to thrift stores in my area that there are often wheelchairs available for $25 or less. Similar for walkers and other mobility devices that tend to be really expensive new.
We don't question why different computers are more expensive than others even though they all do the same job. We don't question why one bike costs more than another despite using the same mechanism for propulsion. Wheelchairs are another good with varying levels of quality at different price points. It's arguably more important for quality goods to be accessible because for many, they're living in these things constantly.