While I know that Walmart prices tend to be regional, I wanted to give you something to be on the lookout for! My Walmart in Clearwater, FL (Coachmen Rd) had 16 oz. packages of Strawberries for $1 each as well as Red Seedless grapes at $0.87 a pound! I have checked the price on grapes elsewhere and lately they have been over $2 a pound, so I stocked up!
I love to take my grapes and put them in the freezer! So yummy & refreshing!! 
