Poly 318 4bbl intake manifold

I have one of these manifolds that I would like to sell, wondering how to best go about it. I think it is pretty rare, as most poly 318 engines came only with two barrel carbs. This is an original Mopar part, been stored for many years, and appears to be in good condition.

Since I doubt there are any poly 318 owners on this site, what would be a good place to sell it? Any opinions of what it is worth?

Thanks guys,

Mark