This perplexes me as well and it is also often, but not always true in the U.S. I got a female, trophy example of a certain morph from a small breeder for $300.00 and there are bigger breeders still charging $100.00 to $150.00 more. I guess if the animals they produce are selling at the prices they are asking, more power to them.
There are some breeders I see that I literally don't understand how their animals are selling though, I'm talking about asking prices for single and double gene animals close to triple what the average is on classifieds forums. I hear they tend to advertise at that and you are supposed to call them to get the real price though, I don't understand that, I don't even call them, I don't like haggling or insulting someone with offers.