This may just be nitpicky but I don't understand why she doesn't sell puppies with papers. You can get limited registration with AKC which means your dog has papers but you can't register puppies.
You can see the specifics here Plus registering a little is a nominal cost once you have already done things like shots, checkups, docking, dewclaws etc. Spaying or neutering is the only real way to prevent unwanted litters. Again, this may just be me being picky, and of course only IMO but it sounds like an odd thing to do. If you do decide to get the pup best of luck! Like chips I guess who can have just one?