Rare Shark Tooth Fossil For Sale

I found a rare extinct Charcharondon Hastalis (shark of Mako & Great White lineage) Upper Tooth off coast of Emerald Isle NC. This appears to be from the Miocene and Pliocene era (25M years) according to a marine biologist. I've given my collections away to family kids to continue and wanted to see how much i could get out of this one. It measure 1 5/8" long by 1 1/8" wide. Make me an offer today! I'm told its worth over $500 but not looking for anything close to that. Best Offer wins today.