There doesn't seem to be a market to recoup costs on second hand ones though... and once you work with a 1DX, the 1Ds III looks and feels like a dinosaur... I was cursing even at the lack of a Q button... and the ISO performance is nothing short of stellar on the 1DX.
Agreed. I feel like the 1DX is like a 1Ds3/1D4 combo camera. The RAW files are much, much easier to push, the IQ is outstanding across an insanely large ISO spread, and man is it fast! The sensor is better in the 1DX vs the 1Ds3.
But I'm off topic. I did use a 1Ds3 myself and I loved the camera. But since I do sports and other things, I need ISO flexibility. In studio, or in well-lit situations, the 1Ds3 is a monster. Even today, almost 6 years later, it is probably Canon's 2nd or 3rd best camera.