I have a quittance I know that has this key gun. It was made by his grandfather and he wants to know value, and maybe wants to sell it. I have a few ideas but want to get some other input to see if I am in the ball park. Its an atypical type of thing so its not easy to put a value on it. If anyone has seen these before, were they kits? Or is it completely fabricated from scratch? I remember many years ago that something like this was a kit you could buy and finish. Thanks for any help.