I own similar car.
If it has been maintained than 800,000rs is an excellent price. Body should have no Rust at all. You will not get better sedan in similar price range. Before purchasing check the gear.
Put it in D if you hear grinding noises than probably CVT gear is near end of life.
Check all the way to L gear.
While driving the shifts should be very smooth from very little to no jerks at all.
Check the tires and specially the howling sound problem which come when car is driven at 60/70kmh speeds, if you hear such sound don't worry the replacement parts are easy and cheap to find.
Check the coolant of the car. It should be original factory one if not than remember that radiator or engine has at some point been overheated because of which owner has changed the factory coolant plus there should be no Rust in radiator.
Check the bumpers for alignment.
What more do u want to ask?