Here's an area where Americans miss out in my opinion, except in certain markets like swap meets and flea markets, which are rare. I used to love trips to markets in Mexico and other places where the word negocio actually means business.
Americans think you are being cheap if you negotiate. Aristocratic if you don't care about price. My grandmother, a depression-era mixed race (mulatto in SW Mississippi ) picked up a durogatory term from her white bosses. I remember teaching her to stop saying "Jew 'em down". The language was bad. The practice was not.
I negotiate where I think the merchant has the power.