Ever tried working on a free reed instrument? They are seriously complicated. I'm a little into concertinas, and you wonder how a little box that will fit into an 8in cube can be so damn expensive, until you look, and there must be a dozen fiddly little components for each of 30 buttons, and 60 reeds to tune... Its no wonder there isn't much of a home build scene!

Piano accordions seem to suffer particularly from people playing half ass versions of unsuitable tunes as fast as possible. With the right repertoire and for some reason especially the button instruments it's another matter, so long as you're into the styles.