You will find that most Bernese breeders are very inquisitive about prospective purchasers. Expect to be asked lots of questions about your family, your home, your lifestyle, your job and your schedule. Any reputable breeder will want to make sure that potential owners are knowledgeable and committed, and that a Bernese Mountain Dog is a suitable choice under the circumstances. Answer honestly...its not a test. And remember, just as you have the right not to buy from a certain breeder, every breeder has their own criteria for deciding where their puppies are placed.
As a buyer, you should be focused on finding a breeder that you both like and respect. You should have the same or similar views on development and training issues. You should understand and agree with the breeder's goals, both in general and with respect to the breeding pair in question. You should be comfortable that the breeder will be a resource available to you in future years.
Remember...in all likelihood you will choose a breeder or breeders months before the puppies are actually born. Since most breeders have waiting lists, you are truly choosing a breeder and not choosing a puppy.
Thus, it becomes absolutely critical that you ask the right questions so you can make an informed decision.
Although not an exhaustive list, the following questions are an excellent start. Don't plan to rattle through every question with every breeder. Instead, use the questions that are really important to you to help narrow the list. Then, as the breeders get to know you better, you can continue your education as well.
The only wrong way to buy a puppy is not to ask any questions at all.
If you don't understand what some of the questions mean, then ask the breeder! Just say that someone suggested that you ask this question, and would they be so kind as to explain the significance of the question as well as the answer. Again...you will impress the breeder by showing that you've done your homework to know what questions to ask, and by showing that you're still continuing your learning process.
As far a selecting a puppy, you might not have a choice. Many breeders will do the selection themselves. This may involve temperament and personality testing, and this may also be a function of dividing show and pet quality puppies. The breeder will try to best match each puppy with the prospective owners. If you trust your breeder, then trust their selection.
One final thought on selecting a puppy: don't get hung up on perfect markings. Unless you're buying a show quality pup, you probably won't get a perfectly marked Berner (even if such a thing existed). The true magic of the Bernese Mountain Dog is its boundless love and affection, not its markings. An over-marked or under-marked Berner can be just as sweet, just as gentle, and just as wonderful as every other Berner. Beauty is only fur deep!
Bernese Mountain Dog Info Pages