Because this thread is here to inform others of what to watch out for when buying a pup, I'm putting out the following.
Ultimately, it comes down to the owner of the pet knowing what is right and what is wrong and insisting the right thing be done. If a breeder won't keep the dog until it's physically stable, then it's up to the prospective owner to walk away, even if that means losing some money.
It's also up to the prospective owner to be aware of the laws that apply to the sale/transport of dogs in your area. If you are lucky enough to live in a state that has them, you need to know them backwards and forwards:
Lemon Laws for Dogs A dog sold in Florida would fall under those laws. In this case, it absolutely is the right of the buyer to get a refund if they so choose. The buyer can sign away that right, but why would you purchase from a breeder who wanted you to?
Again, knowledge is power. It's incumbent on all prospective pet owners to do their research first, and not be suckered in by a slick sales presentation and a cute little face.