Well, that's assuming the car is fine. But the whole subject of salvage/rebuilt titles opens a door of mystery. Needless to say, an insurance company totaled this car because it had an extreme amount of damage. (More than just a "rear door" being repaired. Otherwise, they would have paid to repair it, not replace the entire car...and insurance companies don't make bad bets with their money.) Quite often salvage cars have frame or alignment issues and don't drive like they once did.
The question I'd ask is, can you see the body shop bill? What did they fix? Also, when did it happen? If it was before the current owner bought it, then the value of the car was even higher...and thus the threshold to total it was even higher = more damage. A clue: the navi screen has a crack...is that from the impact? Were any airbags deployed? If yes to both questions, the car was in a serious accident.