What's this creature worth

Hey guys, what's it worth? I would appreciate all your opinions, as usual. You are the experts. I was approached by a fellow mopar lover about selling his 69 f6 stripe delete gts. Non numbers matching( but period correct) 383, 4sp, 3:91 sure grip, title and fender tag, has had new rear quarters installed, the floors are good, all other body is salvageable, but needs paint and finished, it's been stored 20-25 yrs.it has new fuel tank with, but fuel system needs went through.What's this creature worth ???
$20,000 depending on condition. Really hard to tell without photos. My way of thinking, it's worth more than 15 and probably not worth 25.