Profane people are willing to relinquish things of lasting spiritual value because they live to satisfy their basic appetites. – Allen Ross in Creation and Blessing
A bowl of beans! There are historical attestations of birth rights being sold. In a poor family this might involve selling the birthright for a lamb or a goat. This was a wealthy family that God had richly blessed. Esau trades the eternal, for the temporal.
Do you count the gospel, all the promises of God that are yours in Christ as a treasure hid in the field worth selling everything for or as something less than a bowl of beans?