I have a yorkie/chi ("chorkie") and he was only $100 or $150 (can't remember now), as I got him at 5 months old from another family who was getting rid of him. I personally (being a biased mommy) think he's the most adorable dog in the whole world - BUT I still wouldn't have paid $600 for him. Do you have any pictures? I would love to see the little cuties!