Answer: In the Name of Allah Most Merciful & Compassionate
Price tags are considered to be a “display price” for goods on display for the purpose of sale (ma`rud `ala sawm al-shira’). That display price has consequences–if an item is damaged or destroyed, for example, the customer would be liable–but it isn’t considered (on its own) an offer. For example, the item could be the last unit–and the company doesn’t sell the last (display) unit.
[ref: Ibn Abidin, Radd al-Muhtar; Majalla]