If I were a breeder, I would be ceasing my operation at this time. Each day I see more and more yorkies (and other nice full breed dogs) listed on Craigslist (and other sites) for practically nothing. There are also way too many being turned into shelters now, because people losing jobs can't afford to take care of their dogs. Between the shelters, the market being flooded with yorkies and the economy, it's just not a good time to for puppy sales.
I even saw one on Craigslist up for barter on air conditioning work