Well, in my humble opinion, there is just NO SUCH THING as a show quality chicken. What good breeders do, is breed their birds as close to the APA Standard of Perfection as they can.
Now before anyone flies off the handle, let me say this:
I have shown six different species of animals in my life. Rabbits, chickens, horses, rabbits, goats, and sheep. All in open sanctioned shows. And it boils down to this, each and every time you show, it is just ONE person's opinion on ONE particular day. Even though judges are supposed to be unbiased, and many do try, personal preference gets in the way again and again. Some judges know more about certain breeds, some judges like a certain "look", some judges like a certain age, some judges just don't want to look silly and look up something they're unsure of. If you want nice animals, look for someone advertising birds bred to the standard, not someone advertising show quality. Because, as I said, there's no such thing.
As another point, even getting an animal with a proven show record doesn't mean you will be getting a show quality animal. Conditiong goes a long way toward show turnout, and what's popular in one area of the country may not be popular in another.
And (goodness, am I long winded or what!) in many of the animals I have had, the "show quality" animals aren't the ones producing the nicest offspring. I've got some just terrible looking brood does (rabbits) in my barn that are around because they are the best mommas and through the best babies. Looks aren't everything folks! My portly (ok rotund at the moment) Nubian doe that's too short to ever do well in the show ring throws me the loveliest babies and always has multiples as well.