1969 GTS Dart Big Block Exhaust Manifolds

Those were 67's and not worth $1200. The passenger side is the same, but the drivers side is MUCH more restrictive and the wrong casting number as they changed enough of the restriction in the manifold to make a new part entirely. 67 ends in 002 69 ends in 729.

What are they worth? Not many out there to get any kind of comparison value.