$7k is not too far off the mark if a verifiable odometer statement can be provided to prove the mileage. Toss KBB used car valuation out the window. You are looking at what is essentially a "modern" collectable or sport enthusiast car.
Still, I am thinking more along the lines of $5k or so since it is not a convertible.
BTW, the front tag looks out of state. Pehaps MI or maybe even the east coast. Such issues can play into the purchasing decision, especially if a car exposed to harsh climates.