While they seem to be very highly regarded among people who have actually shot one, they don't have a lot of name recognition with the population in general. So, relatively few get ordered by local gun dealers, and the ones that do get snapped up by people who have been looking for them.
Kinda the same deal with Colt 1911's - at least around here.
I was looking for one to try before I bought my PPQ, but never found one. As it turns out I'm very happy with the PPQ, but I still would like to try one some time.
si vis pacem para bellum