If you are asking how much they cost that would really depend on which country you are living in, as well as whether you buy the dog from a recognised and registred breeder or from a backyard breeder or a puppy mill. The recognised breeder would be more expensive, but would definitely be the better choice.

Well, they are mutts. Probably $100 at a SHELTER instead of a backyard breeder who charge $300 ++++++

You check with your Breeder. This is why it is good to purchase your dog from an ethical breeder, not a backyard puppy breeder either. You can find out if she was OFA certified hips and elbows from the AKC papers but as far as personality, etc. you would check from your ethical breeder. An ethical breeder would only breed to improve the breed and her breeding stock would be of sound mind and body and checked for hip, elbow dysplasia, heart problems, eye problems, etc.

Yes because they are endangered and we don't want them to become exstinct