Discuss the below:
Q: Nina owns a used car lot. She signs and sends a fax to Seth, a used car wholesaler who has a huge lot of cars in the same city. The fax says, "Confirming our agrmt-I pick any 15 cars fr yr lot-30% below blue book." Seth reads the fax, laughs, and throws it away. Two weeks later, Nina arrives and demands to purchase 15 of Seth's cars.
Is he obligated to sell the 15 cars requested by Nina?