Connie, the yorkie grooming video I have, the groomer recommends these Fromm shears. I've had them now for a couple of years and they work great, haven't dulled at all. She recommended if you are only buying one set of shears to get the curved pair, so that is what I did. And, honestly I have never felt like I needed another set. You could probably find them other places, I was ordering quite a few things she recommended from Petedge so went ahead and got my shears then.
PetEdge: Fromm Premier III Series Curved Shears 6 1/2"