I agree about backyard breeders, but at the same time, my vet's opinion is that this is just one of those things that happens. He said that we all know someone with a 5'4 mom and a 5'8 dad that grew up to be 6'5". He said Yorkies are no different.
And, while I do agree that standards need to be adhered to, I don't think that breeders are all to blame. I think natural occurrences happen, and those Yorkies deserve a great home as all other dogs do.
And, regarding the money issue, it is not that we couldn't afford an expensive Yorkie. We just chose not to. The value of a pet cannot be based on the amount of money paid for them....or, in our case, his/her size.

With kids and the economy, we just couldn't justify it.