Used Nikon SB24 (SB-24) flash gun. Minor signs of use and (new) velcro strap but no damage and no discolouration. In regular on- and off-camera (strobist) use for the past year, with 100% reliability. Offered for purchase as seen. Excellent for use in strobist setups, either as main light or as slave unit (optical sensor not included). Works with all DSLRs, not just Nikon, though some advanced features may not be compatible with all cameras. Recommended by "The Strobist" in 2006 as a good unit for the "Starving Student Light Kit".