This means it was inviting offers and in legal terms this is called an invitation to treat. Fisher v Bell (1961) is also an example where the court held that any product displayed in shops is not necessarily an offer but an invitation to treat because the shopkeeper has the right to decide at what price he wants to sell the item. . The tag that was on the vase in the window was only a gift invitation and not a postal regulation because the rule does not apply to gift invitations but only applies to offers. Ben made an offer to buy the vase from John using a letter, the decision to accept the offer was in John's hands as long as he does not enter into any contractual agreement he is not obligated to sell the vase to Ben.John and ChetChet makes a 'real offer of £400 to buy the vase from John. John responded to the offer by making a counter offer as in the case of Hyde v Wrench (1840) to sell the vase to Chet for £450 but Chet repeated his offer of £400 but making a counter offer to the new offer that John made. Chet was firm in his offer and insisted that he would only pay £400 for the vase, meaning he did not accept John's offer. 450