What pisses me off is when the online menu says market price.
I understand it reprinting menus every day is expensive, but if you are updating your point of sale terminals, you can type in the price into the online menu.
Ah, that explains it. Over here in Germany, presumably the entirety of the EU and likelu most of the world this is not allowed:
Any business offering goods or services to consumers or advertising goods or services to consumers by stating prices must state the total prices.
§ 3 (1), PAngV
Of course, this isn't nearly detailed enough. That's why, for restaurants etc. the following applies:
The price lists must either be clearly legible at the time of the offer, displayed on tables or presented to each guest before orders are taken and upon request when the order is settled. A price list showing the prices of the main food and drink on offer must be displayed next to the entrance to the restaurant. If the restaurant is part of another establishment, it is sufficient to display the price list at the entrance to the restaurant section.
§ 13 (2), PAngV
Just listing the menu with "market price" would violate both these paragraphs. The following exists as well:
The prices listed in the price lists in accordance with sections 1 to 3 must include the service charge and all other surcharges.
They will tell you the price when you are there and ask or if you call the restaurant. I've seen Market Price listed for fish and some more rare and exotic things like alligator and rattlesnake presumably because the price to the restaurant can change or the it could be based off the weight of a lobster or something like that.
When I've seen it, the menu item was something like fish or lobster mostly, presumably because the cost to the restaurant can change as the prices as the market change and depending on the size of the fish or lobster. Otherwise, I've only seen it for rare/exotic meats like alligator or rattlesnake.
I mean for things like bottled water or soda, 'market price' should be fine. Those are commonly bought everywhere. Things available locally should mention the current price, can't expect guests to know trends.
Ah, now that's a straight up scam. Market price should directly mean the price 'printed' on it or the retail price. Anything else needs to be mentioned explicitly