Good question!
Are you looking for a puppy?
There are several great breeders on YT
If you want a champion sired pup you will pay a bit more maybe $1500+
You may be able to get a puppy with a good pedigree for around $1000 Although I may be wrong.
I think it is important to find a breeder who you feel comfortable with, with healthy, bred to standard Yorkies. If you just choose on price you may get a really cute puppy that does not turn out to be what you thought or wanted.
I'm not an expert, this is just my experience. I'm sure you will get loads of good advice on here