What is it worth?

I am no expert, but that looks almost exactly like the 1964 Dart GT Vert 4 speed 8 cylinder runner I just bought last Friday in only mine is black . . . working on it now . . . you talk about fun to drive! The one you are looking at is the slant 6 cylinder--If it does not need an immediate engine rebuild and you have time to do your own wrenching, that is a decent price at least in my experience of buying one car (I recommend getting advice from someone more experienced than me!) There is also an entire /6 community out there dedicated to celebrating that engine . . . Hope it works out for you!