I'm seeing the same thing with my CB johnstonii. These are fantastic chameleons and CB are incredibly rare in the US but still I have gotten little interest.
It is quite said there is little interest. I'd love to get one of these, I just don't have the money
It's really a shame that people don't venture into other species, but I think they just get nervous when they read about how hard it is to care for the WC adults that are brought in. Even though the CB ones are much hardier and easier to deal with, I think people are just too nervous to venture from the norm