That sounds like a kitten mill to me. Not to mention the price for those cats seem very low... sphynx should be upwards of $1000, the low price seems fishy to me.
You should never buy a cat or a dog from a "breeder" that is willing to ship them.
Any caring breeder will insist on meeting you before allowing you to take one of their kittens and will want you to meet the parents as well. They will also not be willing to ship their kittens.
Look up Kitten and Puppy mills, there is more info on puppy mills but it is the same deal, just with dogs instead. It is a terrible business and you do not want to support them. You are very likely to get a sick kitten.
Hope that helps! I've linked some info on kitten mills in my source.
Some key points:
When you talk to people about their kitties there are a few warning signs when you are dealing with a disreputable, unethical, or irresponsible breeder:
* The "breeder" is more interested in the price your paying, then the welfare of the animal.
* The "breeder" doesn't care about meeting you several times in order to know if you'll provide a good home for their animal or not.
* The "breeder" lacks knowledge about the breed.
* The "breeder" shows ignorance or denial of genetic defects in the breed.
* The "breeder" doesn't let you observe the kitten or adults, or let you see the cattery.
* The "breeder" has no documentation & cannot provide papers. The cats are not socialized.