Hi and Welcome! Is the the breed you mentioned one that you are looking for (or was it just an example?) The differences in price are all in marketing. The nighter priced chicks I would assume are green fire birds. They imported a lot of the rarer breeds on the market and then charge a large amount for them. Some people really like their birds, but I have heard that once they get them back to the US the don't do anything to improve them. What you would find at a larger commercial hatchery for that breed is about the same. They are more concerned with profits and not so much breeding to the SOP.