A homeowner is selling her house by auction. Two bidders place the same value on the house at…

A homeowner is selling her house by auction. Two bidders place the same value on the house at $100,000, while the next bidder values the house at $80,000. Should the homeowner use a first-price or second-price auction to sell the house, or does it matter? What if the highest valuation is $100,000, the next is $95,000 and the rest are no more than $90,000?