The heavenly whip is widely considered to be the worst weapon in the game, because of it's ability to only train using controlled and low strength bonus. But its special attack, Destruction, is considered the best special attack in the game, because using it automatically hits 4 times at your max hit, although each hit has the normal chance of missing. Because of this, it is one of the most widely used weapon in the game.
This weapon used to be worth 500-600 million when it was released and nowadays its not worth more than 25,982 GP.