I can share....we didn't have a ton of money when looking for my girls either....With Chanel....I fell in love with her on site... & her price was VERY affordable.....but while searching for Cheri - I did look at ALOT of yorkies.....
Tell your sister it CAN be done and to be patient....The hardest part is seeing one you want and cant afford
...but there are really nice yorkies out there - she just has to go see them in person and try to see the parents.....
and IF she can try to save a little more money so she doesn't get one like you just described.....they may be just fine - but she doesn't need to rush into anything ....and a few hundred more my get her a nicer quality....then again - it may not.
I know I've posted against the high price of yorkies ....but I really feel some yorkies are just priced right out of good homes....
I use myself as an example. I just don't have the funds to spend thousands - but my girls have a WONDERFUL home and I'm a good mom - what breeder wouldn't want that for their babies ?