Pretty much everything that we buy these days we can haggle with the prices to save a bit here and there. Now I know we can't do this with everything that we want and need but there are things that we can.
When buying appliances haggle with the seller and see about getting a price change. The worst thing that your gonna hear is no and then you can also go elsewhere and possibly haggle for a lower price there.
When buying a house or a car, you haggled right, this is the best way to get what you need at a lower price. I always do this when I am shopping at flea markets, yard sales and more.
Most places and people are willing to take a lower price to make a sale. So it is always worth the attempt to get a lower price for what ever your shopping for.
Now I don't recommend walking into a store and grabbing a bunch of groceries or something like that and try to haggle with the cashier to get a price reduction. That doesn't work unless you have coupons.