It depends on many things. You can get a possibly mixed, puppy mill type pup from some backyard breeder for $100.
You can pay more and get a healthy purebred dog from a good line for a lot more.
Remember, quality is more important when you'll have this animal for ten years or more. Poor skin, bad eyes, bad hips, poor temperments, etc can all be issues with chowchows. Take the time to find a good breeder.