Backyard breeders are not your typical breeders. Most breeders are in the business because they love their breed and aim to create the best breed they can with minimal diseases. Money is soley a bonus for them. However, backyard breeders are in business to make as much money off of a popular breed or one that is rare so they can have a better profit.
How can you tell the difference from a reputable breeder and a non-reputable one? Reputable breeders will have a history of the dogs used to breed, will raise their dogs in a loving environment and will provide papers to be registered. Also, breeders are in it because they love the breed, many will take the breed back if there is any difficulty in the new house the puppy has gone to and some will even provide first shots.
A small amount of those who breed are breeding for pets. They may raise hybrids or other breeds for that purpose.
If someone is a backyard breeder, you will see it in how the dogs are being taken care of, and they are going to be more interested in the dollar signs instead of how their breed is being improved. Look to see what kind of environment the dogs are being raised in and pay special attention to their demeanors.
All dogs deserve to be in good homes. Just keep an eye out for the breeders who do so to exploit rather than enhance the breeds. I'd love to hear your thoughts.