Let me just throw this out there….for most people who are willing to spend 250-300k on a car, spending another 100-200k will not be a limiting factor in their decision making. What will affect their decision is:
1) Just how much do they love the car
2) Do they expect it to depreciate significantly.
The answer to the first question seems pretty clear. People really really love this car. Barring any major catastrophic mechanical failures in the first few months of production, this will not change. Second, depreciation will be directly related to the number produced. Keep in mind that many "non-ford" people who missed out on the 05-06 GT are now sensitized to this car, and will be interested in purchasing it. They are aware of the appreciation that our cars have enjoyed, and this has turned them on to the GT even more. In addition, wealth has increased tremendously around the world in the past ten years. The number of billionaires in the US has increased by a factor of greater than 10! The number of people around the world who would pay north of 400K is way way more than 200 as suggested earlier. If Ford limits production on this car, and especially if they announce that there will not be an immediate successor after the two to three year run, I think the car will settle out at around 500-600k (that's assuming only 300-400 units per year). The thing with this car is that it just looks so incredible! You don't get tired of looking at it. I can't say that about too many modern cars although I may be a bit biased.