I think with this level of camera and the popularity of the MKII with pro photographers, the price will hold its level for a good few years. I replaced my 5d classic with the 5dMKII at the end of last year and it was quite difficult to get hold of. Remember that the BBC has approved the video of the MKII as a production camera - see here:
If the MKIII is as good or probably better because continuous auto focus for video will be an added feature, then we mortals stand little chance of getting one until it has been out for some time. I could be wrong though, but Canon do not flood the market with this level of camera unless they are very sure about it.