The fender is off kilter, so even adjusting the horn grille and turn signal housing on the right side, it is not parallel with the bumper. The extra gaskets under the horn grille show what Rich is referring to with someone not familiar with Porsches.
Here is how quarter panels are supposed to look (photo is from a SWB, so torsion bar cover is closer to the wheel opening than it would be on your car).
All the issues are fixable, of course, and the car can be sold as a driver without changing a thing. But I think the value is hovering in the low teens because of visible problems and unanswered questions, and can vary based on PPI results.