> or omitting to update a sign by mistake

No, in this case the shop is legitimately offering an item for sale, and then forgetting to change the price they are offering it at. It's quite disingenuous for a shop to put up signs, and then act like those numbers aren't legally binding, while the real prices are hidden away in a database somewhere. If they want to have their database be the authoritative copy pricing information, then they can just not put up price signs to begin with.

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dmurray 2 days ago | parent [-]

> If they want to have their database be the authoritative copy pricing information, then they can just not put up price signs to begin with.

This one really does vary by jurisdiction, but no, grocery stores generally must display prices by law.

	▲	mindslight 2 days ago \| parent [-]
		Sure, but the point of those laws is to diminish the ability for merchants to obscure prices, as a deliberate public policy goal. Such places are likely to have more proactive regulations against price discrepancies well, rather than common law "freedom". Still I can imagine a few ways for a store to post prices without being in the territory of forming binding offers - keep stock only accessible to employees, post obnoxious signs everywhere stating that the prices are for informational purposes and that no offer is implied, require membership for entry with appropriate terms, etc. Or rather than continuing to run the complexity treadmill trying to escape regulation, stores can just accept that they're bound by laws that were settled quite some time ago, and that their business includes making offers to sell items.