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When property values fluctuate, who may still collect maaser oni? The Gemara (גמרא) distinguishes between someone whose property depreciated along with the general market versus a poshei'a whose unique circumstances caused isolated losses. Rashi (רש"י)'s two interpretations of "ad mechtzah" yield dramatically different approaches to whether we assess eligibility by current market value or original worth.
This shiur tackles one of the most challenging sugyos in Bava Kamma, found on daf 7a, which deals with the eligibility for maaser oni (the poor tithe) when someone owns property that has depreciated in value. Rabbi Zweig warns at the outset that this is an exceptionally difficult sugya requiring hours of preparation just to understand the basic positions, and that he will likely need two days just to present the three shitos in the Gemara (גמרא) plus the Rambam (רמב"ם)'s complicated fourth position. The foundational Gemara establishes that a person with assets worth less than 200 zuz may receive maaser oni—and may receive even large sums at once. Someone with 200 zuz or more cannot receive maaser oni at all. The question arises: what happens when someone owns real estate (income property, not their residence) that has fluctuated in value?
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Bava Kamma 7a
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