1D MK IV is in a league of its own, in a class by itself
Kenneth G. Nielsen "Kenneth", Amazon
2 November 2014
Summary: Top of the line professional camera. When you study the results on Canon forums you begin to see that it takes a good photographer to take good pictures, then comes the glass, the all-important lenses that yield the best results begin to show that this is the next important area that leads to taking...
Summary: I have purchased a $3000 camera, and it happened to have a damaged view finder. I sent a message to this seller and sent to camera to local canon dealer for repairing, and it took longer time.
Summary: The guy I bought the camera from said the shutter count was 34,847 he was wrong the shutter was replace and it had 37.899 on the new shutter. He also said everything worked not so the hot shoe did not work!
Summary: This is a professional level DSLR. For sports and wildlife at 10fps and a crop factor of 1.3 it just doesn't get better than this. If you are lucky enough to find one, go for it, you will never regret it.