White spots can be fixed with spray paint.
As for whether you should buy the dog ask yourself:
What do I want to do with the dog?
Is the breeder health testing and titling the breeding stock?
What is the breeders PROVEN reputation?
Is there a health and temperment guarentee?
The answers to those questions will be the answer to your thread.
Fyi: The grandfather being a VA Dog means nothing, what is going on in all the generations from the sire/dam onwards. Many breeders love to rest on the laurels of dogs they had nothing to do with several generations back be it show or working titles.
Such shy animals are in all circumstances an encumbrance to their owner, who must be ashamed of such a dog, and a disgrace to their race. Under no circumstances whatever must they be used for breeding, however noble and striking they may appear.