You should ask her again about certifying hip structure for her GSD's. They may not have hip issues now, but the future is unpredictable. You might also want to ask about the bloodline if you really want a purebred german shepherd.
As sad as it is, while there are so many dogs in shelters, many of them will grow to have an abundance of health problems. It's safer to either not get emotionally attached (which let's face it- is almost impossible), or to just get one from a reliable breeder.