I've heard many stories of axanthics coming from breeding two wc's in a farming facility and popping out some axanthics. How common is this?

I also saw a guy who is from Belgium or something FIND a wc axanthic in a pet shop of all places, and it was only 62$!!! It's an amazing axanthic as well, probly one of the better ones. In a few years there could be a new line out.