Question: what to ask a breeder before buying?
Answer: How Long Have You Been A Breeder? ... 
Can I Meet The Parents? ... 
How Have The Puppies Been Socialized? ... 
Is The Puppy Up-To-Date On Vaccinations And Has He Been Dewormed? ... 
What Health Guarantees And Reclaiming Policies Do You Provide In Your Contract? ... 
Do You Have References? ... 
Can We Contact You After Taking The Puppy Home?