As far as I know the yellow belly thing is not proof of "het" for anything. It has been a much debated subject. I have 4 bp's, and all have yellow bellies, does it mean they are "het" for anything, - most likely not. Be very careful of scammers out there trying to make a fast buck on someone who really does not know that a yellow belly may or may not mean anything. There was a discussion on this subject here on this site a while back, it may be in the archives, you would have to look. The one that really knows about this discussion well is KLG, I am sure if you drop her a PM, she would be glad to answer your question. :lol:
*Jeanne*
"To acquire knowledge, one must study; but to acquire wisdom, one must observe"