If that gun is truly legit...I would imagine it's worth quite a sum of money. How much...I can't honestly say, but I bet it won't last long at it's current listed price
As to your question about making it to old Forge, I am at a loss. Not sure what that is or where for that matter! You may be mistaking me for someone else.
I have saved the pictures of this gun as I too enjoy looking at such pieces of art. I hope to have the Cody info on the gun tomorrow and I will post the results of that here.