Trash or Treasure? added pics....

I'm new to the board, but a life long mopar fan. I've come across a 72 Demon, w/ the original 340 and 4 spd intact. It's an A/C car. Then interior HAS to be replaced, rear quarters are shot (but thats to be expected around here) and the drivers floor pan is rotted. Can anyone shoot me a ballpark valuation on this thing?
I don't want to insult the guy, but don't want to play the part of the sucker either. Thanks!