Erchin 3:1-2

Erchin (Arachin) 3:1

The laws of valuations can have both lenient and stringent ramifications; a hereditary field can have both lenient and stringent ramifications; an ox with a history of goring that kills a servant can have both lenient and stringent ramifications; a rapist, a seducer and a man who slanders his wife’s reputation can have both lenient and stringent ramifications. The laws of valuations can have both lenient and stringent ramifications as follows: regardless of whether one dedicated the valuation of the handsomest or the ugliest person in Israel, he pays the same 50 sela, while if one vowed to donate this person’s individual value, he must pay what that person would be worth in the slave market (which could be more or less).

Erchin (Arachin) 3:2

A hereditary field can have both lenient and stringent ramifications as follows: regardless of whether one redeems a sandy field in Machoz or a garden in Sebaste, he must pay 50 silver shekels for a piece of land large enough to plant a chomer (i.e., a kor) of barley, while one must pay the actual value to redeem a field that he purchased. Rabbi Eliezer says that a hereditary field is the same as a field that one purchased (in that one pays 50 silver shekel per kor). Rather, a hereditary field only differs from a field that was purchased in that one adds a fifth to the price of a hereditary field and not to a field that one purchased.