Congrats on the new pup be sure to read up on chinese cresteds though, they are a tricky breed!
But the people who did breed her are infact backyard breeders. Hopefully next time you'll look in a shelter?

BTW I thought I'd input, I'm fairly sure that a pet store can NOT deny anyone the right to buy a puppy as the puppies in the store are infact merchandise, sad as it is.