I see many used cameras advertised and I am curious about one aspect:
Some people mention how many clicks the camera has... so naturally I ask: How many clicks can a camera take? Let's assume the D-30.
Is the number of clicks an important factor when purchasing used cameras?
Can this number be verified? Can it be forged?
What happens when you reach the FINAL click? How much money are we talking about here to get it fixed or whatever we have to do when we reach there?
I feel that pros tend to be aware of number of clicks and know exactly when to ditch the camera and buy a new one! Is that true?
-amateur

-- for a price. They fixed the clutch problem of my B&H EF100-400mm L IS USM 2 months ago. 
