Roy
If it's as you describe, it will be a lot. However it would increase the interest if you could take some quality pictures and post the serial number that is in front of the trigger guard. This will maximise the interest and allow for a proper valuation to be made. Hosting pictures is easy and there is a sticky at the top of the page detailing how to do it. Alternatively you might find a nice fellow in the collectors corner to do it for you.
There will be a lot of people holding their breath!!
HTH
Mark