Cheerios-Recession-weary consumers find haggling can cut costs - chicagotribune.com

Recession-weary consumers find haggling can cut costs - chicagotribune.com: "Recession-weary consumers find haggling can cut costs
Marked-down prices are supposed to be final, but Schmidt and a growing number of American consumers seem to think otherwise."

...............

How come there is no procedure for haggling on consumables- like cereal or bread or sugar?