Well, there are quite a few 'verts out there that sell for more, but you are missing the fender tag, there is the radiator/cowl number discrepancy, and it is a 318 car. Any of these could keep the price down compared to better documented, more desireably optioned cars.
You also mentioned "stated value" so I'm assuming this is for insurance purposes. You might dig deeper into this with your insurance company and see if they are willing to do an agreed value policy instead. A key difference being that stated value means you gave the insurer a statement of value and they have the OPTION of paying either the adjusted value based on documented resources (nada books or the sort) or stated value of your car should anything happen to it. Inevitivly they will choose the lower. Agreed value means they will sign that they agree with the value of the car as your appraisal presents it and they will pay that amount in an event of a loss.