As with most teacup breeds the Yorkies can be expensive. Teacup Yorkies can cost anywhere from $1000 to $5000 dollars. The smaller they are the more expensive they can be.. Try contacting a few different breeders to see what they have available and what the cost will be.
98 pounds for a 14 year old who is 5'3 is not a bad weight as long as you are health. The difference in weight is brought about by different body structure, genes, activity as well as health status. Besides all these, one is expected or advised to exercise regularly.