1) are you familiar with shar-pei fever and amyloidosis and do any of your breeder adults ever experienced fevers?
2) have you ever had an skin allergies with your adults?
3) what does your guarantee cover?
4) have you had much of a problem with cancer in the lines or are you aware of any adults within 3 generations that have died of cancer?
5) how well do you know your genetic pedigree of the lines you are breeding?
6) do you have any veterinarian references or 10 puppy references that I could talk to?
Breeders could never guarantee that you will never become a statistic with either cancer, familiar shar-pei fever or amyloidosis but the fact that they can openly talk about the genetics of the pedigrees that they are breeding and offer you some assurances that they are more sound than not, and be there to offer you assistance if you run into problems is a huge asset when considering them as your breeder.
It is also important to see the parents of the pupppy you are buying, you are looking for healthy animals both physically and mentally. You can expect the dam of the pups (mother to have blown her coat as this is normal) but she should be aloof (snobby) but friendly as should the rest of the dogs including the sire (dad). Breeders should not hesitate to show you pictures, but better yet the adults themselves. Inspect the kennels for cleanliness and hopefully most pups are raised indoors with the family for socialization.
Price wise you can expect to pay in around the $800.00 - $1,000.00 range for a good pet puppy and maybe a little more a breeding animal depending on breeders contract.
Take your time learning, the more you learn the better equipped you are to buy, and who you would like to buy from, this is a buyer beware market and it is up to you to educate yourself.