I could never buy an older unfired gun. I buy guns to shoot not just look at and I would be way too tempted to shoot it and its gone this long without being shot. Props to you for shooting it.
I do agree you could put the stock parts back on it and sale it as an unmodified gun. But once fired, even just once it's no longer an unfired gun. Doesn't matter if its once or 1000 times, it ruins the value. Pulling the trigger on an unfired gun is look signing the title on a new car. It's no longer new and became used.