It will take time untill you will find a breeder that will give to you the "perfect" yorkie, because in most cases they don´t sell the really good one´s. You should look for a good breeder who is successful in the rings. Atthe moment that would be for example Parkside´s, Rothby´s, Durrer´s, Caraneal´s and so on. I only got my show girl because Me and the breeder were friends before, they also breed Maltese and Shih Tzu and I looked after the dogs svereal times and then started to drive to dogshows with them and learned how to show a dog correctly. I think that is nearly the best way. If you want to know how a good dog should look like here is the adress of a good HP
http://www.sweetyblue.com They have many show results on their pages with many many pictures. Do you want to buy in the USA or in Europe or in another country?? The breeder of my bitch is going to get a litter out of a Canadian Ch. Bitch and a German Jr. Ch. Sire in September. They also ship to America.