I think most of us are suggesting you find another breeder. That shy pup is out of her lines, but can also be exacerbated by her lack of interaction with the puppies, by the breeder and by people other than the breeder. I think that you run the risk of getting a puppy that is poorly socialized with any pup you buy from her. If you get one from her at 8 weeks, and it is pretty outgoing, and you socialize it very carefully, you may be ok.
But I probably wouldn't chance it.
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