I didn't buy it, I found it... along with some fossilized bone, on a little day excursion to look for arrowheads and glacial erratics, about 3 years ago. It was the big find of the day. I brought it home & set up a little display. It was my first respectable wild find & it totally hypercharged my interest in geology & archeology. That is the main reason. The other is that I always carry a lighter. 😅