There are many things to consider when buying a puppy.
What Breed,your lifestyle,what gender,size,and most importantly what health issues are found within your chosen breed.
Buying a puppy should be a careful,thoughtful decision and all members of the family should agree.
It helps to visit Dog Shows/Events and talk to Breeders with years of experience and a wealth of knowlege of your chosen breed.
So where do you find a Breeder?
A good starting point is the breed clubs,they usually know of good reptuable ethical breeders.The kennel club has a list of breed clubs.A link to the KC
The Kennel Club
It is very important to know where your puppy comes from,there are lots of Disreputable and Commercial Breeders out there who will only be too happy to take your cash and sell you a sickly non health tested puppy.Do Not buy a puppy because you feel sorry for it,this only encourages this sort of person to keep breeding.
You should always see the puppies with there Dam (Mother), the Sire (father) may not be available to be viewed as he may be owned by someone other than the Breeders.The Breeder will usually only be too happy to give you the contact details and show photos of the sire.
Check that the Dam appears healthy,has a good temperament and the puppies appear healthy.
Ask to see all the relavent paperwork, Pedigree,KC Registration Documents and proof of Health Testing required for your chosen breed.The Kennel Club is the only offical registration body,if puppies are registered with any other Registration Company or not registered at all ask the Breeder why.These Breeders are best avoided as their main objective of Breeding such a litter will usually be for fiancial gain,rather than improving on a breed or retaining a puppy for showing.
Be prepared for the Breeder to ask you lots of questions,they do this because they want the best possible homes for there puppies,they will also welcome any questions you have.They will provide you with Diet,Worming,Excercise & Socialisation advice along with full support when you take your puppy home.The recommended age in which puppies should go to their new homes is 8 weeks of age,be wary of Breeders who want you to collect your puppy earlier than this.
Be wary of Breeders who try and convince you that because of the colour of the puppy it is worth more money because it's "rare".If the colour is recognised by the KC it is not unusual or rare.
If you have any suspicions or doubts about a Litter or Breeder,contact your nearest Breed Club and check the Breeder out with them, or Walk Away.