Reference for Bava Metzia 100:2

מי סברת פחות משליש לרבי טרפון כפחות משתות לרבנן דמי לא משתות ועד שליש לרבי טרפון כשתות עצמה לרבנן דמי אי הכי במאי שמחו מעיקרא

If so, whereat did they rejoice [in the first place]? Hence you may deduce that in the view of the Rabbis, in a case of annulment of the sale, one can always withdraw; they thus rejoiced when R. Tarfon told them that it [an overcharge up to a third] constitutes overreaching.<span class="x" onmousemove="('comment',' Whereas on the ruling of the Rabbis, if it is more than one-sixth, the transaction is altogether cancelled. ');">²</span>

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow