Ed - if there ever was a thread that proved you are a troll, this is it. Go away.

Muchatrucha - I don't think your question can be asked generically. If the gun is a pristine pre-war Boss, the forcing cone work and the proof issue will have a big impact on value. If it is a $1500 gamekeeper shooter, the impact could be de minimis if the gun can be shot safely.

Such a long, long time to be gone, and a short time to be there.