Actually, there are new regulations that if you sell puppies, sight unseen, you will fall under USDA regulations, which most breeders do not want to do, because it requires things to be run like a farm moreso than puppies being raised in a home environment.
To avoid this, you can refuse to ship puppies, and require owners to come pick them up. This means you will not fall under USDA regulations soley because you ship puppies to people you haven't met. You may still fall under the regulations depending on how many puppies/litters are produced.
USDA probably has guidelines for shipping so I am guessing the breeeder is avoiding falling under their regualtions.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC