I saw a NIB gun from the 80s bring $600 at a live auction this weekend, but the gun you describe should sell for right around $300. I have been buying and selling on GunBroker and I will look for one for you. I went to an auction 6 months ago where they sold 24 of them, police training guns, but I only bought one, and it is long gone. It should be an easy one to come up with, Shotgunner