In the sales comparison approach, special-purpose or one-of-a-kind properties usually _______ be valued.

In the sales comparison approach, special-purpose or one-of-a-kind properties usually cannot be valued effectively. This appraisal method relies on finding comparable sales data to establish a property's value based on what similar properties have sold for in the market. For common properties, there tends to be a robust dataset from which to draw comparisons, providing a solid foundation for valuation.

However, special-purpose properties, which may include unique assets like schools, churches, or specialized industrial facilities, often lack sufficient comparable sales. The rarity or specialized nature of these properties makes it challenging to find recent sales of similar properties within the same market area that can provide relevant data points for comparison. As a result, relying on the sales comparison approach for such unique properties may not yield accurate or meaningful results, thereby illustrating why they usually cannot be valued effectively using this method.