A good reproduction is worth this much, but if you have your heart set on ancient points there is no guarantee you will be getting what you want. This is especially true for the Paleo Points like Clovis, Scottsbluff, etc. A great many dealers will tell you that they can tell the difference. After being in this business for over 14 years I never saw anyone that could really tell you which stone point was real and which one was fake every time. There are hundreds of people who will tell you that they can tell, however.
Some dealers are better than others, but nobody can really make a reliable guarantee.
This is true if they have a PhD in anthropology, have been a dealer for a thousand years or offer a very slick Certificate of Authenticity. Even a moneyback guarantee is no assurance. Nearly every dealer knows that only a small percentage of points ever come back, and even if they make this guarantee and get some back, they will make money anyway on the ones that aren't returned. This doesn't mean that dealers are bad folks. It's just a bad situation.