Too bad you can't get ahold of the daughter directly...
You probably already know this, but (just in case) check the outside where those 'opera' windows are, they are prone to rot, if they are good, and the underside is good, the car will start and drive under it's own power, and the interior is in pretty good shape, then it would be worth it.
The downside is, it hasn't been driven for over 16 years. That's a long time even for an eagle. There's probably seals that will have to be replaced, but if you're planning to do any kind of drivetrain work, then it's probably worth it (??)
I hate to name a price, but I would consider up to $1000 for the car (if all that is good) to be worth it. Maybe offer her like $500, and see where it goes from there?
Just a suggestion...