Uberti and Pietta didn't make a lot of them to begin with. And I'm not sure about Uberti, but Pietta has since quit making them. That makes them even harder to get. Usually when you do find one, there's a premium on it.
I personally like the way they look. I just don't care for the feel. That triggerguard is hard on my knuckle. Even just cocking the piece, the trigger guard hits my knuckle.
I'm sure it was a design element carried over from the Dragoon. But the Dragoon is a much bigger gun and the guard doesn't hit my finger.