Duffer and Slicker, who lived in different suburbs 20 miles apart, were golfing acquaintances at the Interurban Country Club. Both were traveling salesmen Duffer for a pharmaceutical house and Slicker for a widget manufacturer. Duffer wrote Slicker by United States mail on Friday, October 8: I need a motorcycle for transportation to the country club, and will buy your Sujocki for $1,200 upon your bringing it to my home address above [stated in the letterhead] on or before noon, November 12 next. This offer is not subject to countermand.  Sincerely,  [signed] Duffer Slicker replied by mail the following day: I accept your offer, and promise to deliver the bike as you specified.  Sincerely,  [signed] Slicker This letter, although properly addressed, was misdirected by the postal service and not received by Duffer until November 10. Duffer had bought another Sujocki bike from Koolcat for $1,050 a few hours before. Koolcat saw Slicker at the Interurban Country Club on November 11 and said, "I sold my Sujocki to Duffer yesterday for $1,050. Would you consider selling me 46 yours for $950?" Slicker replied, "I'll let you know in a few days." On November 12, Slicker took his Sujocki to Duffer's residence; he arrived at 11:15 a.m. Duffer was asleep and did not answer Slicker's doorbell rings until 12:15 p.m. Duffer then rejected Slicker's bike on the ground that he had already bought Koolcat's"What is the probable legal effect of Koolcat's conversation with Slicker and report that he (Koolcat) had sold his Sujocki to Duffer on November 10?
This report had no legal effect because Duffer's offer was irrevocable until November 12. Unless a contract had already been formed between Slicker and Duffer, Koolcat's report to Slicker operated to terminate Slicker's power of accepting Duffer's offer.  This report has no legal effect because the offer had been made by a prospective buyer (Duffer) rather than a prospective seller. Koolcat's conversation with Slicker on November 11 terminated Duffer's original offer and operated as an offer by Koolcat to buy Slicker's Sujocki for $950.