found an aluminum gm sbc rectangular port intake manifold with 3972110 part number, i've seen these things from few hundred to 1K plus. how do i know how much this things really worth? it has the winters emblem on it and an "oil shield/heat shield" underneith that is present. ALSO has "123456789" casted underneith the shield. any help here?


thanks guys

 

here's a few pics.