I've seen low white ones for as low as $400 and from what I've heard the amount of white the parent has does not determine the amount of white the offspring will have. so a low white can still produce high white. you'll get a veriety in the same clutch.
I was thinking about getting one myself to breed to one of my pastels...pastel calico's look amazing!!! but I don't think that callico's are nice enough on their own to pay a really high price but they do have great combo potential!
I think I'm just work on different projects till the prices drop a little