What might my K3 might be worth?

Please refer to new posting

Is that a crack in the bottom of the manifold in that video?

I take back what i said IT IS NOT a crack but a line or something that is on the manifold, i just had to go get the horn so i could look at it, i will take some pictures in a little bit when i go make some noise at the lake.

Here are some pictures.

All the marks you see ARE NOT damage just the spray paint chipping off just about everywhere.