Thank you for your response.
I agree it is confusing. The question has been set with the assumption that it is an offer and it appears difficult to argue. As you quite rightly speculated, the offer was revoked in the same channel as it was advertised Shuey v U.S. (1875) 92 US 73, and I have looking for way to argue breach.
I have Byrne & Co v Leon Van Tien Hoven & Co (1880) 5 C.P.D. 349, establishes that “a person who has accepted an offer not known to him to have been revoked, shall be in a position safely to act upon the footing that the offer and acceptance constitute a contract binding on both parties”
My current argument would be that the revocation notice was insufficient, Dickinson v Dodds (1876), given that Respondent issued the notice in a single issue of a newspaper the day before the Appellant accepted the offer by performance; advert specified to take payment to newspaper, which the Appellant did and was then notified the item was no longer for sale.
I was just looking for other angles when it occurred to me that the reducing daily price could imply an auction or tendering aspect to this.....???