The serial number is not of collectable value. The C series blue guns began at C20001. So you can see my point. It would be a valuable gun to someone who just wanted to have an unfired blue CombatMaster, no matter what the era. With a box and all the original stuff, it becomes worth more, since those are desired things by collectors, but the piece itself usually has to have a low serial number to be considered collectible.

So, it's back to "how bad do you want it"?

Hope this helps, ...Deeton