题目内容

Question 3
John wrote to Mary asking "Will you sell your second-hand car? Please tell me your lowest price." Mary replied in a letter: "The lowest price for my used car is $2,000." John then sent the second letter to Mary saying that he agreed to buy the used car for $2,000. But before Mary received the letter from John, Mary sold her used car to David.
Can John sue Mary to enforce the contract?

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