Thanks everyone

I found a couple of websites but I'm not sure if I should be buying a pup from this website:
https://sites.google.com/site/babyyorkies/nursery
I'm not sure if this is going off topic, but does it matter if the pup is AKC registered? The AKC registered puppies seem to be a lot more expensive than the breeders who don't mention AKC. Also, what is a reasonable price for a yorkie? I've seen a "teacup" for 3500! I already know about the potential health problems. Sorry if this is going off topic! If it's a problem, I could start a new thread. I just really need help