Advise
Bob owns a stamp shop on Muncaster High Street. On Monday he places an item in the advertising column of the Muncaster Evening Gazette. "Utopian Penny Red Stamp, one only, �750 or nearest offer".
Later that day, Alan a stamp collector, telephones Bob and says "The Utopian Red for saler, I'll take it for �700. Bob replies "I cannot accept less than �725 but I will not sell it to anyone before Saturday. Let me have a reply by Friday if you want it." Alan replies: "that is kind of you. Remind me to buy you a drink when I see you."
On Wednesday, Alan telephones Bob and leaves a message on his answering machine stating "I accept your offer". Unfortunately, Bob's infant son later presses a buton on the machine which erases the message before Bob listens to the recording. Later that day Bob sells the stamp to Cedric for �750.
On Thursday Alan meets Cedrics aged mother. She tells him that she has seen Cederic's nine year old son who told her that his father was very excited at having acquired a Utopian Penny Red from a High Street dealer.
Alan rushes home and posts a letter to Bob confirming the message which he had left on his machine. On the same day Bob writes to Alan withdrawing his offer.
On Friday morning Alan receives Bob's letter and at lunch-time Bob receives Alan's letter.
Advise Alan