The one I am ordering for my wedding is three hundred if you can believe it. It's a replication of a victorian corset. It's all hand made except now instead of whale bone, it's steel :o)
During a good bit of the victorian period, especially the later part, it was steel, too...the whalebone had the consistancy more of some of the nylon boning and might not be firm enough for the later victorian corsets.
A properly made 18th cent set of stays would hold its shape without being on a form, it had so much boning.