Guys I need your help! Im shopping for a used 5d3, and I would really appreciate your feedback regarding some questions I have! Just a few, here we go: (1) while many sellers happily provide a shutter count, several people have said when asked that "There is no way to know the true shutter count. You can only tell how many shots were taken since last battery recharge which has nothing to do with actual shutter count", or something to that effect. What the heck! I thought ther