What makes you think that ANY serious, reputable breeders make any money breeding cats? Or that they don't do it for love of the animals? Did you think that a person would turn around and house whole males and females in their homes with all the associated work and care which comes from maintaining these animals if they didn't love the cats and the breed they choose to work with?
When you pay for a registered cat, you are HOPEFULLY paying for the breeder's knowledge of the genetic health of the lines, something which you have NO shot of doing if the cats are not registered without traceable pedigrees. Just because a cat is registered, it does NOT make it show quality. Registered breeders do sell out their pet-quality kittens, but what makes them a pet vs. breeder or show is merely cosmetic - not as a result of a possible lethal problem.
If you want a cheap, non-registered "Siamese" you can acquire one from www.meezer.org
or any other of a number of breed-specific rescue groups who wind up having to save the "cheap" Siamese that people dump because they didn't pay enough for the cats to value them. That way, at least you are saving a cat whose ancestry is unknown rather than paying for the privilege of someone who feels that its just fun to have a bunch of kittens running around their house whose ancestries are also unknown.
Breeding consists of far more than simply allowing two cats who are not neutered to reproduce.
It is also of concern that if a person cannot afford to pay a reasonable pet price for a registered kitten, they probably also can't afford to pay vet bills if something happens to the animal.
I'm not suggesting that this is so in your case, but you do a disservice to ALL breeders by implying that it is perfectly OK for someone to breed unregistered cats or registered cats thrown together by BYBs who purchased registered cats from some other BYB who acquired a registered cat from a reputable breeder because that breeder ultimately did not check out the prospective buyer well enough.
I'm sure that you love your baby with all of your heart, and it is perfectly proper for someone who wishes to preserve Old Style bloodlines in the breed for the sake of preserving the breed - the resulting kittens not being showable - but it is NOT OK to have people breed for no purpose other than to produce kittens for the pet trade. There are way too many kittens/cats looking for loving permanent homes. There is no need for people to breed to produce more of these cats.
The current going rate in the Northeastern US for pet-quality modern Siamese from a reptuable breeder is $500.00. The price of Old Style kittens may cost even more.
Sorry to make you feel I'm being harsh, but I cannot condone breeding just for the sake of producing pets. There is a great deal of difference between someone who breeds an untitled cat and someone who breeds an unregistered cat or a registered cat who is of such poor quality typewise that there is absolutely no possibility of its or any of its offspring ever being shown.