two years ago his would have been $15-24K

Lets translate the listing shall we:

Ad: " It looks like it has never been hit."
Translation: I can't tell if it's been wrecked if I squint and tilt my head like this.

Ad: " It has new base coat/clear coat Limelight green paint "
Translation: We've covered all of the problem areas, but don't worry, they'll be showing rust volcanoes soon.

Ad: "It has new carpeting"
Translation: the old crap was so moldy from the leaky seals that we HAD to replace it for health reasons.

Ad: "The fuel gauge doesn't work......"
Translation: It's had some electrical problems in the past and I'm selling so it wont burn my garage to the ground.

Ad: "The original fender tag is there and there were two build sheets in the car, but they were for another dart."
Translation: Someone was going change the VIN and hack together a highly optioned car, but it wasn't me.......honest!

Don't get me wrong, real 340 4 speed, nice find and pretty rare these days. Not #'s matching, in need of basically a total restore. I'm sure that beast has some stories to tell.