[chickensmith]

I think if I understand the yorkie pup he has is purebred and he is asking $800 for? Is it one of his pups from breeding? Does he have any paperwork? Unfortunately some genetic defects don't show up until they are older....so he may appear healthy now but if he was poorly bred could get ill later in life. Some are so severe that they do show up as puppies. I would ask (if you haven't ) where the pup came from and if he has info on parents, breeder etc.