✔ 最佳答案
係你比offer佢.
超市標價出售貨品, 並非offer, 而是Invitation to treat. 顧客拿貨品到收銀處是向超市作出offer, 所以超市可以不接受你的offer, 拒絕賣貨品給你.
商店標價出售貨物=Invitation to treat 這原則在Pharmaceutical Society v Boots Cash Chemists (Southern) Ltd. 及Fisher v Bell 這兩個案例中已清楚確立.
兩個案例的內容可參考:
Pharmaceutical Society v Boots Cash Chemists (Southern) :
http://en.wikipedia.org/wiki/Pharmaceutical_Society_of_Great_Britain_v._Boots_Cash_Chemists_(Southern)_Ltd.
Fisher v Bell :
http://en.wikipedia.org/wiki/Fisher_v._Bell