Selection and risk. In clothing especially, people can have hundreds of thousands of individuals skus and only a handful of units on most of them. Amazon doesn'

Selection and risk. In clothing especially, people can have hundreds of thousands of individuals skus and only a handful of units on most of them. Amazon doesn't want to stock the long tail. In some areas people have unique deals and ways to get products cheaper than Amazon, or they pay more but accept a lower profit margin.