Are bananas ALWAYS the number one selling item at Walmart, or does it fluctuate?2. Has the popularity of bananas been affected by the rise of online grocery shopping?11. What can other retailers learn from Walmart’s success with bananas?What’s REALLY Flying Off Walmart’s Shelves? The absolute, undisputed champion of Walmart’s sales arena, the item consistently snatched up more than any other, is none other than the humblebanana. Yes, that potassium-packed, conveniently-peeled fruit reigns supreme in the land of rollback prices.