For what could equal the value of a human soul?

Fullmetal Alchemist: Brotherhood

Disregard for alchemy’s laws ripped half of Edward Elric’s limbs from his body and left his brother Alphonse’s soul clinging to a suit of armor. To restore what was lost, the brothers seek the Philosopher’s Stone. Enemies and allies – the corrupt military, the Homunculi, and foreign alchemists – will alter the Elric brothers course, but their purpose will remain unchanged and their bond unbreakable.