Mike and Waqas are acquaintances, who choose to live their lives without the use of modern forms of communication or technology.

Last month, in a local social club, Mike, offered Waqas, his collection of Star Wars' movie memorabilia, for 1000. The collection included a Chewbacca costume, used by the production studio, and a rare model of the Millennium Falcon. Waqas asked Mike for 'time to think about it' and, in response, Mike said 'I will keep it open until the 10^th of September, that's seven days from tomorrow'. On leaving the social club, they exchanged addresses.

Two days' later, Waqas sent a letter to Mike asking whether he would consider taking 800 for the collection. Mike took Waqas' request as an indication that Waqas did not want the items for 1000 and, as Mike discovered that Olie, his brother, would be willing to pay 1000 for them, sold and delivered the collection to Olie for 1000.

On the 8^th of September, Waqas, realising that the week was almost up and having heard nothing from Mike, decided to send a letter to Mike, accepting Mike's offer. This letter arrived at Mike's house on the 10^th of September, a day after a letter arrived at Waqas' house, from Mike, telling Waqas that the memorabilia had been sold to someone else.

Waqas is gravely disappointed on hearing this news, as he had a buyer, Sunny, lined up, who was willing to pay 1500 for the collection.

Advise Waqas and Mike as to their respective legal position.