A shopkeeper displayed a butterfly knife in his shop window with a price tag of £15. He was prosecuted under the Restriction of Offensive Weapons Act 1959, which made it an offence to "offer for sale" certain offensive weapons. The shopkeeper argued that the display was not an "offer for sale." A magistrate is hearing the case and must determine the correct approach to interpreting "offer for sale."
Which of the following best describes how the court would likely interpret "offer for sale" in this statute?