I know many breeders accept paypal, but just don't have the BIG blazing yellow Paypal button....it just smacks of commercialism to me, and I don't think that is what puppies should be about.
Don't get discouraged....that puppy is out there...and sometimes, when it is right, it seems they almost do just walk up to your door or fall in your lap (or so, it seems that easy)
You'll probably get private messages from some offering pups. Please be careful with those offers too. I would suggest asking someone you've come to trust and like the looks of their dog about who their breeder is - someone that is happy with their dog and that has had them a few years (being happy with a puppy is one thing, some problems don't show up for awhile). Nancy1999 is in AZ too and I know her Joey is a wonderful yorkie, maybe ask her in private message who his breeder is.