If I were in search of a tiny I would sooner buy from a breeder that purposely breeds smaller rather than someone own accidently had a runt and decided the price should triple because of size.
I talked to Yorkmont the other day for quiet awhile, she is very sweet, knowledgable and willing to talk the night away conversing about yorkies, breeding all sizes and shapes and showing.
She purposely breeds small not by bringing down her stock but breeding into the tinier lines. Therefore she intimately knows her past pedigrees when it come to health, genetics and size there are no surprises. She does it with great care and keeps her babies up to a year (if needed) before she will place them. She explains she has a long process that must be followed when adopting one of her kids including she sends a 200 page care package!! Yikes!!! Her pricing for the tinies start at $3000. She breeds the look of a yorkshire terrier not the flavor of the month.
http://www.yorkmontyorkshireterriers...atid=13&gid=99