We have a couple of antigue shops that sell the India made arrowheads for $.50 so just because they are in an antique shop means nothing SO with that being said.
You have had a lot of years of experience tell you their opinions, all of which are, the points you have are "trinkets". BUT like my arrowhead hunting mentor told me once when I would walk up with a "Rock" and asked if it was an arrowhead he would say, "Mr Doering", they can be anything you want them to be.
One other point, no pun intended, a famous flintknapper in the United States, known by many and has made several videos on flintknapping made a reproduction of a point to be sold as real and got caught and his reputation in the knapping world has been tarnished, SO, there are people that make reproductions out their also.
I am such a bad flintknapper that all of my points look like real indian artifacts!!!