I need your advice

The corrosion you mention is "the normal places" for this car's design, you can get brand new sheet metal to use for repair, and move on to other things.

Pretty car.

 

Metric 390mm Wheels ?

 

I think the market is almost to the point to support the repairs to this car.

The only real downside is that the 2V injected motors have a bad rep as oil burners, and the HP is not exactly neck snapping acceleration!

Yank that out and go resto mod on early cams and carbs......LOL!

 

Until the car is gone over it is hard to say what the value would be. I just gave a ball park value but maybe some of the guys who have and are going through restoration can chime in with costs. The body looks OK but being wet we don't know if it just needs a color sand or a repaint. Is there rust and if so where. Is the interior good or does it need to be replaced. Now the can of worms that was not shown is the engine. What does it look like and when was it last running. Do you need to pull it out or can it be brought back to life in the car. Now how about the suspension and the brake system. I would think if you had someone who has knowledge of 308's and repair/restoration could give you some feel as to what the value is today and what it would cost to be brought up to drive-able standards. Remember there are no cheap Ferrari's.