I agree with most of your assertions. I don't believe there will be a value difference for either the 2005 or the 2006. I think over time the color issue will be less important. I think, just like any other used car, it will be the mileage and condition that will mostly set the expensive ones apart from the less expensive ones. I think what will ultimately effect the pricing of these cars is what (if anything) Ford builds next.
One man's opinion