Purchased new in June 2013 through a diving shop and used for 40-50 dives. The last overhaul was in 2015, and the last dive was in 2017. It has been stored since then. There are stains and scratches on the inside of the regulator and the surface of the gauge (see photos 6, 7, and 11). I was careful to rinse it with fresh water after each use and handled it with care. I have never experienced any malfunctions during use. Please understand that this is a long-term storage item and a used item before purchasing. Also, please have it overhauled before use. Please note that used cardboard boxes may be used for packaging.