The seller is pretty hard on this one in his description, but it doesn't look too terrible by Michigan standards (the car is in Missouri). Would have been a pretty sharp ride with its original 383/4-speed/8.75" rear - hope it gets restored.
I do think that as the old car market evolves, cars like the Dart, Nova, etc will be among the more popular of the muscle-era...I'm already seeing some restomods based on these platforms. Much of that probably has to do with the $$$ required to find a solid Camaro or E-body as a starting point.
Link to 1968 Dart GTS Project Car auction