Since your budget is so limited, you may want to try the rescue section here on YT. Checking with local breed specific rescue groups would be a good idea too...usually rehoming fees are considerably less than what breeders will be charging for a pup. (Puppies aren't cheap because breeding ethically isnt' a cheap venture.)
Also, you may want to check the rules at the top of the section...
http://www.yorkietalk.com/forums/yor...ew-thread.html
We do not allow threads begging for free puppies or looking for puppies at extreme reduced costs. Yorkies are generally from $500 on up, with most being in the $1000 to $1500 range. Please do not post looking for Yorkies below $500. If your budget for a Yorkie does not allow for $500 or more, you may want to look into Yorkie rescues or adoptions of older Yorkies, as they may be better suited to your price range.