I've never understood the arrowhead thing. There are many people that expertly and openly reproduce these things by hand, then age them in a tumbler or by other methods to order by the dozen.
I have found gold, silver, many relatively modern artifacts, some ancient artifacts and thousands of modern coins.
Never once in my life have I found or personally ever witnessed someone I know well to to have found an arrowhead.
Furthermore I have spent lots of time hunting on former Indian land riverbanks, beaches, tree lines, wet stream beds, Dry stream beds
i'm sure they are out there, and I'm sure some are genuine, but I believe that those remaining are extremely rare. I don't know how possibly they can be found in clusters, and how it is that the same few people are in possesion of dozens of them.
To me this is an "emperors new clothes circumstance that I will never understand.