Bargaining

Naively, I'd thought that I'd be bargaining when I went shopping in the marketplaces. But in actual fact, vendors of fruits and vegetables need to have competitive prices, and don't want to spend a lot of time haggling over small transactions. They'll often make up bags of produce or stackes of chiles or avocadoes, and charge everyone 10 pesos for the lot. At the larger weekly markets, they'll even label bags, or put up signs advertising their prices. Makes a lot of sense.
But sometimes we do end up paying gringo prices because we aren't bargaining. For example, we'd been looking for coriander (seeds) for awhile, and an eldery woman at the Tlacolula market happened to be walking about selling them. When we asked her how much, she gave a visible start.....and quoted us a price of 10 pesos. Now it's possible that this was the going price. Ten pesos is less than a dollar. But given that 10 pesos also buys you 2 kilos of baby potatoes or a kilo of bannanas, I'm pretty sure that she saw us and thought "gold mine!".
We decided to make her day and give her her asking price.