Which of the following is a role of an appraiser?

An appraiser primarily serves to estimate the property's market value based on various factors, such as location, condition, and comparable property sales. This valuation process is crucial in real estate transactions, as it provides an objective assessment that helps buyers, sellers, and lenders understand what a property is worth in the current market. The appraiser analyzes market trends and relevant data to arrive at a fair value, which is essential for ensuring that a sale price is justified and for determining loan amounts during financing.

In contrast, determining a buyer's creditworthiness falls more under the responsibilities of lenders who assess financial information to decide if a borrower can afford a mortgage. Negotiating sales contracts is typically a role for real estate agents or brokers who represent the interests of buyers or sellers in a transaction. Lastly, managing real estate investments is a function related to property management or investment analysis, which involves overseeing properties for performance but does not involve the process of appraising property values. Thus, the role of estimating market value is distinctly aligned with an appraiser's primary responsibilities.