Native American Stone Ax Heads

[Cason]

I recently inherited a collection of Native American artifacts. I know a bit about arrowheads and spear points, but not a lot about stone ax heads. Any info I could obtain about them would be greatly appreciated! Thank you for your time!

 

[roadrunner]

Only thing is I know is I sold a long one like in pic top right for $250 on ebay.
The smaller ones towards the bottom go for $75, or less.