the long nails would be a bit of a concern for me. Most breeders regularly trim them beginning very early(so they aren't digging into mom when nursing!) and then keep it up so pups get use to being handled and groomed. If you don't feel comfortable, pass.
I think I'd be more interested in the pedigrees and how they match up...is this a breeding out of convenience or chosen to compliment the individual dogs lines?
Sounds to me that it is out of convenience.