The general protocol I have for reserving a puppy is as follows: I put families down for picking out a puppy in the order I receive their $200 deposit. (I prefer Venmo or PayPal for the deposit.) So, first deposit gets first pick, second deposit, second pick and so on. These picks are done at 8 weeks of age, after the litter is evaluated for show potential by myself and other breeders that I know. The puppies which are show quality will go to show homes first, then the remainder of the puppies will be chosen by the families wanting pet puppies.  I keep everyone up to date by regularly by sending photos to their email/facebook. 
The parents are both certified for OFA hips, elbows, eyes and heart before they are used for breeding. The puppy will be veterinarian checked, have its first series of vaccinations and be given any other wormer or medication that are required before going to their new homes. They will also be sold on a limited registration with an over 18 month old, spay/neuter agreement.  I would like you to provide 2 references, vet, trainer, friend, etc.
Thank you!