I found a great site that sells authentic Native American artifacts, if you are interested in that kind of thing, it’s http://www.kensrelics.com/ . I have some metal African arrowheads on ebay if you wanna check em out. pretty unique, at least I haven’t seen very many.
Two of my great uncles used to take a lot of long walks looking for arrow heads on the sand hills they farmed (and my dad now farms). They built up a pretty nice collection of arrow heads, which now belongs to my dad.