That's the sad fact of it.
I have a '73 340 auto Dart Sport auto in about the same shape as the O.P. and i can't sell it for $800. It doesn't have the engine or trans in it, it is rolling with rallyes.
A lot of people want parts off of it, i will not part it out, it's a 340 car!
I'll keep it until someone appreciates it for what it is.
I don't think the price is out of line.
Good luck and i hope it works out for you.