Unfortunately, females usually go for alot more than that and if you were to find one at that price, there is a possiblity that it would be from a BYB or a puppymill. Since you don't mind age or gender, I would suggest petfinder or a rescue in your area. I know there was just a big rescue in Chicago of 22 yorkies. Good luck, I'm sure if you keep looking you'll find the dog that's meant to be with your family.
http://search.petfinder.com/search/s...cope=2&x=0&y=0