If it's one of the production models, I wouldn't worry about it too much. If it's an older custom model made before the production line stuff, Dan Janes is the one to talk to.
Also, try the Blue Book if you have access to it.
Thanks for the responses, I am sure it is one of the production models probably an AV 06. I just wanted to know so when I sell it I can tell people what it is. I purchased it in a pawn shop for 75 and now I know what its worth.