These artifacts are from a very long time ago. They aren’t made my modern day native americans. (The fancy items with the leather, feathers, bead work, etc.)
There are some VERY primitive looking pipes and and an axe. The axe is basically a carved stone attached to a wooden handle with some type of string made from animal hyde. My great-grandfather discovered them in central ohio when an area was excavated for development.
I don’t think it is wrong to sell them if someone is a collector, of if a museum wants to put them on display.