I would imagine there is quite a bit. As from what I have heard from one of my clients in Asia, there are a number of guys who purchase rare fish from them and thats it, you dont see posts online, nothing mentioned on forums, no pictures upload, they do it just for the joy of having rare fish.
I think that after time the guys who collect these exotic fish will see that the market cannot handle anymore and I think that the price will drop but I think that will only happen in a long time. Alot of the new rare fish have only been collected for a short period of time, I think once more information is published on these guys, the other rare fish collectors will dish out. As we have seen with the Peps and Narcs, the survival rate has not been that great.