28-year-old makes millions buying from Walmart, selling on Amazon
I am surprised that there is so much margin. Is this because:<p>1. Amazon product delivery is so convenient that users don't mind paying little extra or<p>2. Walmart discounts products valuing their warehouse space more. Thus not realizing there was demand for the product elsewhere or at a different time.<p>Seems like it would be simple for Walmart to figure out this arbitrage and shelve products for longer time. Any thoughts ?