A system and related methods for the management and evaluation of broker price opinions comprising, a method of determining a standardized score representative of the accuracy and quality of a broker price opinion. Data from the broker price opinion is extracted and evaluated according to a plurality of rules applicable to the type of broker price opinion. Each rule is given a particular weight, and an appraisal score may be calculating by summing each instance of a rule triggered multiplied by the weight assigned to that rule. Weights may be set by experts, or determined by statistical analysis.