The sea of people is vast, and people in the world are often accustomed to jealously cherishing their own possessions. Whenever they acquire some opportunity or secret tome, they always keep it hidden and shield it from others. This makes Fang Xing's quest to find that lost scroll in the Demon State incredibly difficult. Even if he were to leverage the influence of his family, scouring the entire state, it's unlikely that any clues would surface. That is precisely why Fang Xing directly announced a heavenly price, believing that faced with such a substantial offer, the bastard who acquired the Supreme Scripture wouldn't be able to remain hidden.
The Ten Mountains are enough to exchange for considerable merit for that person.
And the value of the Highest Five Scriptures is worth five times the value of the Supreme Scripture that person holds.
