Answer:
less reliable than the appraiser's.
Explanation:
in such a scenario the broker's opinion of value will be less reliable than the appraiser's. This is mainly because the broker does not have all the information that the appraiser has and is making his opinion without this information, which may lead to unforeseen consequences that would not otherwise occur if the broker had this information and was able to see a much bigger picture of the situation to incorporate into his opinion.
