That woman should thank God the car caught fire when it did and not right after she sold it to somebody.
If her husband had not taken it for a test drive and she then sold it to someone, it probably would of caught fire on them.
If she was lucky they might of returned angry and demanding their money back or worse yet the person could have been seriously injured or killed.
They or their family might of sued and she could of stood to lose a lot more than $1600 or best offer, not to mention the terrible memory of how someone died after they sold them a car.
It is a real blessing that the car caught fire when it did and not after someone else bought and died as a result.