A responsible action on your part as far as I am concerned and hopefully it may save an unsuspecting buyer a lot of hassles. Unfortunately, this car may be responsible for many repetitions of the story about "the rotten eos I once owned" from future owners.
The usual dealer practice in my part of the world is to send the car to an auction for purchase by a second-hand car yard or by a private buyer outbidding the dealer to get a lower-priced second-hand car than they could buy from a car-yard.
The usual dealer practice in my part of the world is to send the car to an auction for purchase by a second-hand car yard or by a private buyer outbidding the dealer to get a lower-priced second-hand car than they could buy from a car-yard.