There are not many Balinese breeders in the world. Each breeder tends to specialize in a particular type. Prospective buyers need to decide what sort of look they prefer and take to breeders to determine what type they are breeding as well as their health and personalities. Don't be surprised if the breeder questions you about the sort of environment you will provide the kitten.
Most good breeders are very careful in selecting homes for their kittens.
You will probably be asked to sign an agreement stating that the cat will be spayed or neutered, that it will NOT be declawed and that it will be kept exclusively indoors. Sometimes cats are advertised as Traditional Balinese but are not registered. These kittens may or may not be pure. If this matters to you, question the breeder regarding the source of their breeding stock, or simply move on to a breeder with clearly pedigreed cats. However, you are still responsible for verifying that particular breeder meets your needs to your satisfaction.