It looks like a '70 to me based on the grill inserts. You'll have to run the VIN to be sure. It's either a 69 or 70 for sure.
I think 500-600 dollars tops for a non-running no title basic truck of that vintage is reasonable. I doubt she could get much more than that if she were to advertise it. If you find more rust than you think you've seen the price should drop sharply.
On the good side it looks pretty complete and fairly straight to me. Check carefully around the top of the windsheild (Inside and out), cowel and firewall. I've seen trucks of this vintage rust there if they've sat in the woods for a long time.
