After looking in my computer in all the sites available during months (puppyfind, livedeal etc..), I found an ad in the Miami Herald and I had the luck to find a serious breeder living just a few miles of my home. I could see my puppy and be sure that she was what I was looking for. Buy a dog in line is very risky. How can you be sure that is not a scam or a fraud.
A yorkie is not a cheap dog and I didn't want to take a chance to lose my money.