Even if the seller priced it at 10% of what he is asking, the price would be too high. His problem is that while the gun started out as a collectible one, it has seen way too much use and is too worn to be in a collectable condition. There also are no photos of the original documentation on it, which are part of the value of a collectable item (if they exist), and since there are no photos one would assume he does not have them.
I have a wonderful Air Ranger (almost the same gun, except for the color and labeling) that is in as good or better condition, and if I sold it it would have to be discounted due to the normal wear that it has on it from tens of thousands of rounds shot and maintenance over the years (but I won't be selling it). At this point, that gun is just an Air Ranger with different labeling . . .
His only hope - even at a discounted price - is to find a really, really stupid buyer with money to burn . . .