Currency Trading and Ona’ah

For C.S. Rabbi Meir Orlian writes: silver sale “Mazal Tov,” Sol said to his friend, Yisrael. “I heard you had a boy recently!” “Thank you,” said Yisrael. “The pidyon haben, redemption of the firstborn son, will take place next week.” “Mr. Kahn has five real silver coins with the proper weight of 3.4 ounces,” said …