Related for Arakhin 6:7

Which is [the time limit for] an announcement of investigation [inviting buyers to view and evaluate a certain property]? An evaluation of orphan's property—30 days; an evaluation of [property that was declared] hekdesh—60 days. If [after the evaluation] they sold [something] worth 100 zuz for 200, or something worth 200 for 100—the sale stands [could be that they made a mistake, or else that they couldn't find buyers for the agreed price]. Rabban Shimon ben Gamliel says: Judges' evaluations that were mistakenly too low or mistakenly too high—their sale stands.