Nikko Magnum Hunter III

I won this shotgun at a Ducks Unlimited Banqet in 1983. It is a pump action, 3" chamber, 26" barrel(I think). It's been shot less than 15 times and has one tiny scratch on the barrel by the forend. I know that Nikko used to make shotguns for Winchester, and went out of business in the late 80's, early 90's. The only other Nikko I can find on the web, is the Double Eagle, which is a whole lot nicer than this one. Those are expensive! Of course, it's a Jap gun, but I have no idea what it's worth. I would rate it at 98-99%. Anyone have an idea on the value?
Thanks in advance,
Darrell