When looking for a reputable breeder for a Siamese cat, there are a few things you can do to ensure that you are getting a healthy, well-bred kitten:

1. Look for a breeder who is a member of a reputable cat breed club, such as the Cat Fanciers’ Association (CFA) or the International Cat Association (TICA). These organizations have strict guidelines for their members and require that breeders follow responsible breeding practices.
2. Ask the breeder about the health of the kitten’s parents. Reputable breeders will be able to provide you with information about the health testing that has been done on the parents, such as for genetic diseases that may be common in the breed.
3. Visit the breeding facility. A reputable breeder will be happy to have you visit their facility and meet the kittens and their parents. This will give you an opportunity to see the living conditions and health of the cats.
4. Ask for references. A reputable breeder should be able to provide you with references from previous kitten buyers who can speak to their experience with the breeder.
5. Be wary of prices that seem too good to be true. While the price of a Siamese kitten can vary, if a breeder is offering kittens at a significantly lower price than other breeders, it may be a red flag that they are not following responsible breeding practices.