A coin collector treasures his 1969minusS doubled die obverse Lincoln cent because he found it in his pocket​ change, rather than purchasing it. He can sell it on the open market for​ $35,000, but would only sell it for at least twice that​ price, due to its sentimental value to him. It is anticipated that the coin will increase in market value in the foreseeable future. What is the value of the​ coin?