Thanks Schnitz,
That's useful info but what I need most of all right now is some guidance on market value for the complete car. The appraiser doesn't seem to have a lot of experience with unusual cars and I need to give him some figures that will keep him away from just using a depreciation table or book values which won't take into account limited supply, strong demand etc.
PS if you've got any pics of the 850 I'd love to seen them.