Mail-in Rebate is a trinket in TBoI: Regambled, a mod for The Binding of Isaac.

COMMON | Base price: 4 coins

This Joker is only available while playing as Jimbo or Tainted Jimbo.

Jimbo:
• Gain +3 coins per [rank] discarded.
• (rank changes every room)

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Tainted Jimbo: Same effect as base game.

• Check out the trinket description on the mod's external Wiki.
• Download TBoI: Regambled from the Steam Workshop.