Determining ACV for car with very few comps

My teen son's 2015 Chevy Traverse was sideswiped and the other driver's State Farm is paying. Just took it to the state farm recommended body shop and the repair estimate was $3200.

This car has a rebuilt salvage title and Missouri has an 80% threshold for total loss, so I strongly suspect they'll want to total it out. I wanted to be proactive about estimating the ACV in case I have to fight their #, but there are almost no comps.

It's a 10 year old Chevy SUV with 160k miles…there are few still on the road. Also, it's the top trim level *and* we live in a smaller town 2 hours from anywhere. There are 3 same year and trim within 300 miles of us, with mileage of 120k, 180k, and 215k. They're priced $11, $8k, $6k, respectively. Would it be a safe bet to guess we're looking at the $6k range? And then reduce that by whatever metric state farm uses for rebuilt salvage?

We plan to keep it and he'll drive it until the doors fall off but that may be sooner than later, so whatever we get goes to the replacement fund.