If it is truly unfired, in the original box with tools, numbered to the gun grips, I would give it a $2000 value.
Obviously, you can not state that the gun is unfired, so I would not give any value to NIB. It is in great condition, but I see what looks like some wear or touch-up at the muzzle and a slight groove under some blue touch-up around the cylinder. Also has wear on the extractor rod, so I would say that the gun has almost certainly been shot some, maybe quite a bit. Remember, this is a target gun, so a large percentage of these revolvers are in great shape for their age. They mostly go from the gun case to the range and home for a thorough cleaning and back in the safe. The value here is the fact that you have a scarce large extractor rod knob with a single line MADE IN USA. There are also those who will pay extra for low serial numbers. I think you have a K-22 that is worth $1000+/-. The serial number, however, could push that price if you get multiple bidders in an auction bidding against each other.