Mammoths, Mastodons & Gomphothere

Don't confuse or even compare a mammoth tooth from Florida or anywhere in the US to those from the North Sea. No matter what you may read, mammoth teeth from the North Sea are not a wise investment. They may look great now, but in a few years they will start to crack and degrade. The salt will slowly break down the fossil which is never very heavily mineralized to begin with, unlike the teeth from coastal South Carolina and Florida.
It is a question of when and not if.