Kimdewall

Hi, I'm new and don't know much about cars, I just want to help my father in law out by seeing if there is interest in this part that I have been made to believe is pretty rare. I hope I am posting in the correct section...if I'm not, I apologize.
Forgive me if my description is not perfect...but he has:
An ORIGINAL Tri Power manifold with three 2 barrel carburetor that includes all 3 carburetors, manifold and air cleaner (factory). This is for the Super High Performance 435 horse 1967 427 corvette. It has the stamping on it, but I haven't gotten that yet. Does anyone know how much something like this should go for and is anyone interested?
Any information is helpful.
Thanks, kimdewall@yahoo.com