Shutter count is like the volume of coke in a can of coke. Can appearance (camera body) very mint, but inside half of the coke drank (shutter count used), if you not thirsty (don't shoot much), drink a bit of the half then throw the can (upgrade or quit hobby), no problem. If very thirsty (machine gun dude), drink till the end (shutter unit finish life and bye), then maybe trouble for you to refill (change shutter unit = extra cost). Of cause you get extra saliva (seller's hand sweat) when buying an open can :bsmilie: