I just noticed you are from Lancaster, you will need to be very careful, puppy mills are everywhere there, and I'm talking about some that are extremely inhumane. They sell to brokers, so you won't even know that you are buying from a puppymill. Thee are many good breeders in PA, even if you have to travel, it's worth it, your Yorkie could be a member of your family for 16 years or more.
Dog Breeders Map List- The Yorkshire Terrier Club of America