(Mishnah): If the owner offered a Sela and another person offered a Sela (to redeem Ma'aser Sheni), the owner has the right to redeem it, since he must add the extra fifth.

If the owner offered a Sela and another offered a Sela and an Issar, the other person has the right to redeem it since he is adding to the principal.

If one redeems his own Ma'aser Sheni, he must add a fifth, whether it's his (that he grew himself) or he received it as a gift.

(Gemara) Question: In the second case, isn't the extra fifth worth more than the extra Issar that the other one offered?

Answer (R. Avin): The owner could act shrewdly and exempt himself from paying the extra fifth (as will be explained in Halachah 3).

The Mishnah taught that the person who offered a Sela and an Issar redeems it, because he added to the principal.

(R. Yaakov bar Ida citing R. Simai): Ma'aser Sheni that is not worth a Perutah does not require the fifth to be added (when it is redeemed).

(R. Yosi bei R. Simon citing R. Yochanan): Any Ma'aser Sheni whose extra fifth is not worth a Perutah does not require it to be added.

Question (R. Ba bar Mamal): A Mishnah (in Maseches Bava Metzia) teaches that there are 5 laws relating to a Perutah. But according to R. Simai, there should be a 6th - that the principal of Ma'aser Sheni must be worth a Perutah (in order to require the extra fifth) and according to R. Yochanan, there should be a 7th - that the extra fifth itself must be worth a Perutah?

Another question: Let that Mishnah also teach the law of R. Abahu citing R. Yochanan, that land cannot be purchased for less than a Perutah?

(Baraisa): If there is Ma'aser Sheni without a known value (as its value is minimal), it's enough to say that it and its extra fifth should be redeemed onto this Sela coin.

Explanation (R. Yosi citing R. Krispa/ R. Yona citing R. Zeira): The Baraisa means that it's enough to use a coin that had already been used to redeem Ma'aser Sheni, as there will certainly be some 'space' remaining on that coin that is Chulin.

(R. Yochanan): If Hekdesh was redeemed for more than it's worth, the Hekdesh fills up all of the money, but Ma'aser Sheni does not.

Question: What's the difference?

Answer (R. Imi): It's the way of a person to give extra to Hekdesh.

Question (R. Zeira to R. Imi): If we would ask the person and he would say that he didn't intend to add, what is the law?

Answer (R. Imi): If that's what he answers, the rest of the money isn't Hekdesh.

Question (R. Yona): According to the opinion that says that Ma'aser Sheni is considered the owner's, the difference between it and Hekdesh is understandable; but according to the opinion that it is not considered the owner's (but rather sanctified money), why is it different from Hekdesh?

(R. Yosi): Even according to that opinion, the reason still applies, that people give extra to Hekdesh.

(R. Yochanan): If Hekdesh was redeemed without adding the fifth, the redemption still takes effect. If Ma'aser Sheni was redeemed without adding the fifth, the redemption does not take effect.

Question: What's the difference?

Answer (R. Hila): The treasurer will demand the payment (so he will certainly eventually add the fifth), but there's no claimant to demand it in the case of Ma'aser Sheni.

Question (R. Yona): According to the opinion that says that Ma'aser Sheni is considered the owner's, there is a concern that he will not pay the fifth; but according to the opinion that it is not considered the owner's (but rather sanctified money), why is it different from Hekdesh? (He will certainly pay the fifth as he views it stringently!)

Answer (R. Yosi): Didn't we already learn that Hekdesh has a claimant (the treasurer) but Ma'aser Sheni does not have a claimant!

The Mishnah taught that if one redeems his own Ma'aser Sheni, he must add a fifth, whether it's his (that he grew himself) or he received it as a gift.

The Mishnah follows R. Meir, who says that a gift is like a sale.

(R. Yona): No; it follows all opinions, as it's referring to produce that he received as a gift that had not yet had its Maaser separated.

Question: A later Mishnah teaches that if one redeems Netah Revai (the fruits of the 4th year of the life of a tree), he must add the extra fifth. Could that be referring to produce that had not had its Netah Revai separated?! (There's no such thing as separating Netah Revai!)

Rather, it must be referring to Netah Revai itself and so too here, it's actual Ma'aser Sheni; therefore, the previous answer must be said (that the Mishnah follows R. Meir).