The appraisal of the judges who undervalued [the property by] a sixth, or overvalued [it by] a sixth —- their sale is invalid. Rab-ban Shimon ben Gamliel says: Their sale is valid. Otherwise, what value has the power of the court? But if they drew up a deed of inspection, even if they sold [property] worth a hundred [zuz] for two hundred, or [property] worth two hundred for a hun-dred, their sale is valid.