what is the value of a 5 PC place setting of noritake whitehall china?

Here is a site that sells replacements, so I'm guessing the actual value and what you would get for a five-piece place setting is very much less.

NORITAKE WHITEHALL at Replacements, Ltd

Your public library has (or can get for you) prices guides on china and also a book that tells of collectible/antique dealers, their location, and what they deal in. eBay and craigslist are of course possibilities for selling.