Its going to be hard to find a Yorkie for $500 or less in this area... If I hear of anyone selling I'll get in touch with you... Also, expect no papers!
Oh, earlier I read up on a member (jadjem) thats a Yorkie rescuer and is referring to:
Please Contact:
Litichia Duffy
Animal Control Officer
City of Osceola Missouri
417-646-8421
there are 6 Yorkies available for adoption
or will be euthenized by Tuesday May 13, 2008
I hope you can help!!
I Love My FurBabies 
Nygee, Gizmo & Gypsy!!