I am in the Chicago area? What do you consider a reasonable price? You should buy from a yeputable breeder that breeds for the betterment of the breed and to the standard. Cheaper is not always better, especially if you wind up with a sickly pup, npo guarantee, no help, no mentoring, etc. Maybe wait a while so you can afford a quality pup. A good place to start is here.
Yorkshire Terrier Club of America About The Club. Beware of getting PM;s from strangers just wanting to sell you a dog. Best of luck.