Please note: "Maaser Sheni" is a secondary tithe taken from produce during certain years of the shemitah cycle. It is brought to Jerusalem and consumed there, or redeemed for coins which are brought to Jerusalem and used to purchase food there.
Money found in a box which held both regular money and maaser sheni: Pesachim 7a
Money found in Jerusalem/on the Temple Mount/by a merchant's stall of animals: Pesachim 7a
If One had left 100 units of maaser sheni in Location X, and then found 200 units there: Pesachim 10a; Beitzah 10b
If One had left 200 units of maaser sheni in Location X, and then found 100 units there: Pesachim 10a; Beitzah 10b-11a
Redemption [Pidyon] of the maaser sheni
How many judges are involved in estimating the value for redemption: Sanhedrin 2a
Redeeming maaser sheni which is in a different location, on "the coin I will remove from my purse," so that the redemption will actually be retroactive: Eruvin 37b
Redeeming maaser sheni with a coin which is located in your home, when you are away: Bava Metzia 45b-46a
Whether produce must be redeemed for money, specifically: Succah 41a; Kiddushin 5a
The minimal coin to be used for redemption: Kiddushin 11b
Exchanging silver coins for gold coins: Bava Metzia 44b-45a
Exchanging silver coins for copper coins: Bava Metzia 55b-56a
Redeeming maaser sheni produce which is worth less than a perutah: Bava Metzia 52b-53b
Redeeming maaser sheni produce which is worth less than 4 perutot: Bava Metzia 53b-53b
Redemption with gold coins - Bava Metzia 44b
Redemption with an Asimon - a non-minted/invalid slug coin: Shabbat 128a; Eruvin 31b; Pesachim 35b; Bava Metzia 47b, 54a; Bechorot 9b
Redemption with a damaged coin: Bava Metzia 52a
Redemption via exchange of a legal bill: Kiddushin 5a, 27a
Redemption with an inferior coin: Bava Metzia 52b
Defining Jerusalem as the area within which one may not redeem maaser sheni: Pesachim 94b
Redeeming the maaser sheni produce in Jerusalem: Pesachim 36b; Makkot 12b, 19b
Redeeming an item wich has purchased with maaser sheni and then contracted death-impurity, in Jerusalem: Pesachim 36b, 38a; Bava Metzia 53a-b; Makkot 19b; Zevachim 49a
Redeeming maaser sheni which was in Jerusalem but then left: Bava Metzia 53a-b
Adding one-fifth when redeeming one's own maaser sheni: Bava Metzia 55b
Is the one-fifth one-quarter of the core amount (keren), or one-fifth of the core amount: Bava Metzia 53b-54a
Whether the one-fifth must be worth at least a perutah: Bava Metzia 53b
Is the one-fifth payment part of the core redemption, such that the item is not redeemed until the one-fifth is paid, or not: Bava Metzia 54a
Pending Payment of the additional one-fifth for those required in it, one may [not] use the maaser sheni: Shabbat 127b; Eruvin 31b; Pesachim 35b; Bava Metzia 54a
What may be used to redeem money of the maaser sheni: Succah 40b-41a
The edict forbidding redemption of maaser sheni on a live animal: Succah 40b-41a
Burning vs. Burial for Secondary-Tithe-bought Items which contract Death-Impurity : Pesachim 38a
Whether one may move Improperly redeemed maaser sheni on Shabbat: Shabbat 128a
Changing Maaser Sheni coins into smaller denominations - in Jerusalem, or elsewhere: Bava Metzia 45a
Changing Maaser Sheni coins into larger denominations, and the concern that this might cause someone to keep Maaser Sheni coins around for years, leading to mistakes: Bava Metzia 45a-b
Status of money found before animal merchants: Bava Metzia 26a
Status of money found on the Temple Mount: Bava Metzia 26a
Status of money found in Jerusalem all year, and at the time of Holidays: Bava Metzia 26a
The status of food which was purchased with maaser sheni money, and then became impure: Bava Metzia 53b