Opinions on what this car is worth

but its a 74 duster not a 70 duster. big difference.

i see the line you are talking about it it looks a lot like a shadow but it also looks like spray paint that doesn't match the hood.. hard to tell not standing next to it though.

It's still a /6 car. I know the 70/71 cars are worth more since I have a couple of '71 Darts, but I still don't think that '70 is worth much more than $3,500. I paid less for my '71 EL5 GT with a 318 in 2008 than I did for my Duster.

As far as 1990's pricing, I bought my '74 in 2012 for that $2k.

I thought that line on the fenders might be a shadow too, but it stays in the same place even when the angle of the pictures change. Looks like a repaint with a blend that doesn't match perfect. But you'd definitely have to see it in person to know what's going on there.