Look harder, compare the radiator support with other cars...What do you notice?
Like I say, doesn't make it a bad car, both of my 240z's have had a minor front end nudge. But this looks like the radiator support bracket was removed? Suggesting maybe the support was replaced? In which case it might have been more than a nudge at the front. Even if the front end needs work to 'correct' it I still think it's worth 20K but the buyer should know what they are buying.