That is a good question and it really all boils down to this. There are certain breeders within the hobby such as myself that value the lineage of our animals. I personally keep over 200 pits of different kinds and when I am in the market for a specific animal, I usually buy it from a "known" breeder that I feel I can trust on the lineage of the animal. A personal quirk, yes it is. Do I sometimes pay a little more to buy an aniaml of known origin. Yes I do, but in the long run it is well worth it to me and I get the resuts I am after in a specific known look etc. .
Take for instance with Deppei Deppei, I have in the past bought animals not out of Limburg's several importation's and each time have been disappointed by the animals. So I only have his line of animals in my collection. Last year I bought some that had been brought in from Germany and after recieving the animals relized that they were not what I want in my collection. Nice animals, but not up to par with Randy's deppei deppei in my opinion.
That does not mean that small breeders do not produce and keep really good quality animals, because they do on a regular basis.
I am known for having numerous pits. of all types and hope that when folks see the name Cherryville Farms on an animal it makes it more desirable because people know my breeding practices and reputation in the hobby.
Likewise you mentioned two of the good guys in this hobby, in my collection I have animals from both John Ginter and John Metlzer. All good quality animals and worth every penny I paid for them. Both are known breeders that produce top quality animals.
Your next question is probally going to be why I say they produce "TOP QUALITY" animals. It is really simple, by having the ability to keep numerous animals the larger breeders have a larger gene pool with which to work. Thereby producing truly unrelated animals. Additionally when it come to color morphs ( albino, hypo, snow etc. ) most of the larger breeder out breed to wild caught or completely different bloodlined animals on a farly regular basis. Even though outbreeding is a long process( produce hets then prodcue offspring from the hets and then breed the morphs aniamls back into theline) it is something that is required to keep a strain viable and thereby again giving the purchaser of the animal a better quality animal.
Hope that helps explain my position on the deal and I hope it helps.

Cherryville Farms - Reptiles