Please read the problem and explain it.

6. Purcell was in failing health and advertised to sell his retail computing equipment business. Quentin was familiar with Purcell's business operations; he sent Purcell a detailed offer to buy for $450 000, paying $75 000 as a cash down payment, with the balance payable in instalments over two years. Purcell promptly sent an email to Quentin stating: \"The price and all the other terms seem fair, except that I need substantially more cash by way of down paymentsay, $125 000. Tell me how high you are willing to go." Quentin replied by email, \"There is no way I can increase the cash payment.\" Purcell replied the next day, \"Okay. I've thought about it, and given the state of my health, l have decided to accept your offer.\" By then, Quentin had heard that the business had suffered because of Purcell's declining health, and he refused to go through with the purchase. He asserted that since Purcell had refused his offer, there was no deal