An edge case, but some 30 years ago or so I was told that in some supermarkets in Brazil, there could be a central display changing prices daily (due to the hyp

An edge case, but some 30 years ago or so I was told that in some supermarkets in Brazil, there could be a central display changing prices daily (due to the hyperinflation) and besides supermarkets people went shopping as early as possible on shop openings to get "yesterday's prices": https://www.npr.org/sections/money/2010/10/04/130329523/how-fake-money-saved-brazil https://www.npr.org/sections/money/2010/10/04/130329523/how-... >In practice, this meant stores had to change their prices every day. The guy in the grocery store would walk the aisles putting new price stickers on the food. Shoppers would run ahead of him, so they could buy their food at the previous day’s price.