Cool Stuff sold on eBay! We just sold some Prehistoric Shark Teeth, or as those in the Science community would call it; ‘Carcharodon Megalodon’.  The Megalodon is an extinct species of shark that lived approximately 23 to 2.6 million years ago, during the Cenozoic Era. We sold this along with a collection of Hemipristis Serra, or Snaggletooth in the English language.