Forgot to mention inside or outside.
I think the most important thing here is if you are happy with the set up and you feel comfortable with the breeder. They should be knowledgable and you should feel satisfied by all their answers, their dogs should be of sound health and kept in excellent conditions whether inside or outside and the dogs should seem welbalanced. Just remember that they have a wealth of information and that you may still have questions to ask in the future so think of the potential purchase as being a type of partnership for the future where you know you can fall back on the breeder at any time in the future and still get the attention from them that they give you when you first show interest in their dogs.