This car is significant in the fact that it's the *only* US-Spec Grand Prix White NA2 3.2L Coupe ever built. That said, 3.2L NA2 Coupes are rare in any color.
As many have said, if it had a black interior, I'd already own it. :tongue: Even with a tan interior, if I had the money and parking space, I'd still consider it.
As for what it's worth, that can be debated all day long, but the fact is, if someone has their heart set on a white 3.2L NA2 Coupe, they pretty much have to pay whatever the seller asks, after all, what can you do, go find another one?
This car is historically significant enough that it should be kept factory original. If someone changes the interior to black, or modifies it, the value of the car goes down significantly. This one is definitely a collectible example, that to change/modify it would kill the collectability (in my opinion anyway).
Also, when changing the interior to black, you can't buy an entire black interior seat cover/door panel set as a whole. You have to buy each piece separately, in a piecemeal fashion. There's a good chance the leather (grain, color, direction, etc) won't match perfectly as it does when the entire set is sourced from the same cuts of leather when built at the factory. With each piece, when you buy them as replacement parts, they are manufactured at different times using different cuts of leather, and there's no way to guarantee that it will match up exactly as a set sourced from the same cut of leather. The end result, is that your interior when inspected closely, looks like a patchwork of different cuts of leather pieced together.
That said, changing most of the pieces should be easy, except for the center console. I think you have to replace the entire dash, as the center console section and dash are one piece. The lower half is tan, and the tan section isn't a separately replaceable piece.