I can't say I saw anything that really jump out at me but $700 is ridiculous for a rescue..that is the highest I have ever heard. Is this for the puppy with the deformed paws? He is old enough to be neutered... I do not see a listing for a litter of pups? I really can't comment on the $50 back if in fact it is for a puppy..
Here are past pictures of dogs they havae placed that were on petfinder..All seem young none of the old and sick which most rescues have.
www.NCYorkieRescue.org, Greensboro, NC: Adopted Pets: Petfinder
What questions have they asked you? That can be very telling also..