Study Guide Bava Metzia 50 Today's daf is sponsored by Rikki and Alan Zibitt in loving memory of Frieda Carlin, Fraydl bat Meir z"l, on her 9th yahrzeit yesterday; and in honor of the birthday of their son, Elon Yitzhak. "Mom, we celebrate your gentleness, fierce love of family and strong moral code, which your grandson has inherited." Various proofs are brought to support Shmuel's opinion that the percentage for ona'ah, exploitation, can be determined based on the market price and also on the amount paid. Two are rejected and one is accepted. The Mishna discusses only the percentage at which there is exploitation. What happens if the amount is less than or more than? If it's less, we assume the parties agreed and they cannot get their money back. However, the Gemara questions whether they also have the same window of opportunity to claim they were overcharged and get the money back that they were overcharged. If they were overcharged more than 1/6, the deal can be canceled. But the Gemara also asks whether that is within the same time frame or is there no statute of limitations. They try to answer both questions from our Mishna, focusing on the fact that first the merchants in Lod were happy with Rabbi Tarfon's ruling and after they heard about his extension of the time limitation, they chose to accept the rabbis' position. However, they were ultimately unsuccessful in reaching an answer to either of the two questions.