This of course is under the assumption that time is expensive relative to the accuracy of the market clearing price of the goods being sold. In many cultures th

This of course is under the assumption that time is expensive relative to the accuracy of the market clearing price of the goods being sold. In many cultures this isn't true, people have lots of free time, but each person buying the good might assign different value to it, so by spending a bit more time the people who need the lower price can still access it, whereas the shopkeeper can still make the money to keep the shop running from those who can afford it. Honestly, thinking that there should be fixed prices for everything, if you're a rich westerner going in, means you're trying to externalize the effort of setting a market clearing rate, and trying to piggy-back off of the locals. If it's at some multinational chain, then sure, don't have people haggle with you over the price of some McNuggets, but at a family owned business, if they can get an additional 20% of the price of the goods they might be doubling their profit margin, so why wouldn't they haggle?