Welcome to TFF ! You should have received a reciept with approx value on it with the documentation from the drawing. Without pics, it's very difficult to assign a value, there's no way to tell from just the serial number if any custom work has been done on the gun. I'm assuming that this was from a Friends of NRA banquet or something like that; many of the guns they auction/raffle off are unique and can't be "looked up" in the bluebook.
My suggestion is to get ahold of the event holders and they can get you some accurate info on the gun. Get as much detail as you can and record everything. Congrats on your new gun!!
What are you gonna do, talk the alien to death? -- (on Sigourney Weaver's worry about Guns in Aliens)
"Safety is something that happens between your ears, not something you hold in your hands."
"I carry a small gun to compensate for my huge Blue press."