I just bought 3 packs of General Mills Honey Nut Cheerios, 55 Ounce 2ct at 6.71 and 10 cases of Poland Springs Original Spring Water, 1 Gallon (Case of 6) at .75 each for an order total of $27.63 shipped with 2 days shipping ( like most groceries).
Amazon is 14.92 for the cereal and 44.95! For the water for a total of 494.66
I may be doing something wrong here and I know that Amazon isn't the place to buy water (that's obviously Costco) but I reckon its a decent savings