Where can one find the true value of Indian arrowheads?

These are artifacts that were found on my father-in-laws farm in MO., and, I suspect they were made by the Blackfeet Indians, as this was their land for thousands of years.
Excellent point and, I agree completely. These were collected over a 30 yr ago, with many found back in the 40’s and 50’s.
None are from a grave~! All were located on top of a hill overlooking a river, turned over by farming activities. Clearly a camp site.

RARE INDIAN ARTIFACTS??? 10 points for best answer.?

My aunt found some very interesting indian artifacts and was wondering if they’d be worth lots of mullah. I couldn’t find anything about any of them on ebay or even google. The first one is an indian knife that is made of amber and it even has two bugs in it!! Yeah. How cool is that?? She also found a little rock that is carved in the exact shape of a hershey’s kiss, which is weird because I don’t think the ‘ol kisses were around at that time. Sooo, if anyone could give me some info about these extremely weird specimen, I would greatly appreciate it. Thank ya very much in advance!!