Fair market value
The Organisation for Economic Co-operation and Development (OECD) defines “fair market value” as the price a willing buyer would pay a willing seller in a transaction on the open market.
For United States tax purposes, Regulation §20.2031-1 states: “The fair market value is the price at which the property would change hands between a willing buyer and a willing seller, neither being under any compulsion to buy or to sell and both having reasonable knowledge of relevant facts”
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