I'm not sure how much your looking to spend, but normally you wont find a healthy quality Yorkie for under $1000. I got my Lillie from Jill Brooks in Muncie IN and I highly reccomend her, there are 3 other YT members on here who have here babies as well, here is her website, chk her out!
www.brooksqualitypuppies.com
If not, then I recommend you look into Yorkie rescue or try the classifieds at
www.petfinder.com
I wish you the best of luck and also Welcome to YT!!!!