What is 'buyers' premium' typically expressed as?

The correct choice describes the "buyers' premium" as a percentage of the final bid price that is added to the winning bid. This fee is typically charged by auction houses to cover their costs and generate profit. It is an additional amount that the winning bidder must pay on top of their bid, which means that if someone wins an item for $1,000 with a 10% buyers' premium, they will actually pay $1,100 in total.

This practice is common in auctions, and understanding it is crucial for both buyers and sellers, as it affects the total cost of purchasing items at auction. The other options do not accurately reflect the nature of the buyers' premium, either misrepresenting its function or suggesting incorrect financial structures associated with auction transactions.