Zagorath

Yes, they have two options. Either honour the sticker price, or stop selling it at all until the price is fixed.

In Australia if the price at the checkout is higher than the price tag you are entitled to the first item free

Got a source on that? That’s not what the ACCC says.

They would have to refuse to sell to anyone. It would likely not be lawful to leave it on the shelf and sell it at the higher price to someone else who might not have noticed the discrepancy, until they fix up the shelf pricing.

Australia, the country the article is talking about. That was a quote from the ACCC website.

Reminder that by law, if the price is listed wrong:

Sometimes the price of an item in store or online at the checkout may not match the displayed or advertised price in store or online. If this happens, even by mistake, the business must either:

• sell the product for the lowest price - either the checkout price, or displayed or advertised price, or
• stop selling the item until the incorrect price is corrected.