The road on Cumberland Island National Sea Shore is literally paved with shark’s teeth. The teeth are also common around Charleston SC in dredge fill.
I have a friend really into collecting them and a real collector has them classified by species. There are books on the subject for avid collectors.
Around 20 years ago I went to Calvert Cliffs hoping to find something interesting. I think I found 1 or 2 very small shark’s teeth. Around the same time I drove to Miami, and somewhere in Florida I found a man selling nice big (2 to 3”) teeth which I bought for a very reasonable price.