I purchased it from Pro Fishing Supply in Waconia,MN. I got a decent deal on it, plus I had some “expiring” points on a c.c. to make it more than 1/3 off the price. Unfortunately the camera face “crystallized” and needed to be sent in. I contacted Marcum right away and they are having me send in just the camera portion so they can replace it under warranty (why I wanted to know where the serial number was). I did notice a tag on the camera cord with a number on it, not knowing if that was the serial number? So when I sent the camera in, I included a copy of my receipt. Unfortunately Marcum has informed me they won’t have replacement cameras for a while. I was able to use the flasher part of the LX9 and totally love it.