No I don't, because that was in response to your comment..... I asked you something, and you couldn't ANSWER it. Instead you started defending your classroom genetics knowledge!
When the parents are low quality, but there may be good quality genes in the gene pool, there is a chance however slim, that some fry will turn good quality. For that you need to see signs/ hints of the recessive desirable gene traits in those small percentage of fries. And when that chance is a matter of shelling out $4 compared to $100 plus, we experienced hobbyists take that chance!... And with experience we do pick up stunners for as little as a few dollars.
Now answer my first question to you..... If you can, that is!