Here's an example of what I paid for my BCI:
Sonoran: $125 e.
Crawl Cay: $650/pair
Cay Caulker: $200 e.
Both my sonorans are at 5 feet and somewhere around 6-7 years old. The parents of my crawls and the caulker are no bigger than 5 feet either.
There is only one breeder of Crawl Cays here in the US that I know of.