This is an older model Minelab Excalibur, that seems to be working fine, but I'm not an expert on them so it is an AS-IS/ Parts sale.
Comes with the charger and appears outwardly to function ok. For someone who wants a real water detector, this is a bargain. I would probably replace the o rings for the knobs, and add a little silicone grease on the gasket/o ring. All available at your hardware store for cheap. It has an upgraded 800 coil too.
I don't dive right now, and don't need it sitting here when someone could be out hunting with it. If nothing else it would make a great movie prop or display item.