Just ONE price sounds good but in reality, shipping is very complicated and the true cost varies greatly depending on your location, quantity of items, and mix

Just ONE price sounds good but in reality, shipping is very complicated and the true cost varies greatly depending on your location, quantity of items, and mix of items in the order. Baking free shipping into the price of every individual SKU most likely means that a retailer will either set a price higher than Amazon or earn negative profit on many orders. In both scenarios, the long-term consequence leads to far fewer small or independent retailers and your only remaining choice being Amazon and perhaps a few other megacorps.