Check out the Yorkshire Terrier Club of America and look at their breeder list.
I have a just under 4 pound Yorkie that is very healthy -- however, she was breed by a show owner who breeds for health and to improve the standard of the breed. Primarily the show breeders breed to get their next champion, not so much for sales.
My pup was a show dog, but good breeders will not consider breeding a female under 5 pounds, plus some judges don't like small Yorkies preferring the 5-6 pound dogs.
My advise is always: chose your breeder first,mother get your pup from them.
I think what others here Are saying to you is that Yorkies are people dogs, and they want their people around them. They tend to get into trouble and be destructive etc.mifmleft alone too much. That being said, most of us do work for a living. I'm lucky in that my pup goes to work with me daily but most don't have that situation. But, just understand that your Yorkiemwill expect your attention and presence.
Good luck in your search! There are some breeders here on YT, hopefully they will come forth and give you more thoughts. Just keep upmost in your search that you want a healthy, well bred dog - that is the best place to start.
Stick around on YT, there are folks here who have been Owned by Yorkies for many, many years and know a lot about them.
__________________ .  Cali  , and Cali's keeper and staff, Jay No, not a "mini" Yorkie - She loves to motor in her Mini Cooper car |