Amazon: Oxo Coasters $9.99 for 8 Walmart: Comparable set, Silicon Coasters $30 for 6
Amazon: DVD Rack $29.99 Walmart: Comparable model from same company, $39.00
Amazon: American Crew Pomade, $21.49 for 2 Walmart: $16.98 for 1
Amazon: 13 Watt CFL, $15.98 for 8 Walmart: Same model, $16.88 for 4
Those were the first 4 items I tried to compare.
Walmart used to be about "made in the USA", then it was "always low prices", now it's about "live better". It's Walmart's ubiquity, convenience, and momentum that keeps them dominant (and their ability to loss-leader competitors out of business).
Zombies. That's the real mistake we're making with shifting all our purchases to Amazon and their just-in-time delivery. There will be nothing to loot when the zombie outbreak happens.