Olympus OMD E-5M * 12-50mm f3.5-5.6 * 45mm f1.8 * 105mm f2.5 (NIKKOR lens)
Found these by chance, just upload your pics into flickr and click on properties, all parameter about the pic will be shown including the shuttle count.
Try it !
actually the shutter will wear out faster if the user shoots machine gun mode
so shutter count is only a rough guide
it is better to know the user and what kind of pictures he shoots