The first four parts of this book are absolutely fascinating. It's an in depth look at the psychology of shopping and it is exactly what the title promises. Underhill's company gets paid to spy on people in stores and see what they're doing wrong and right. The gems in this book are the anecdotes and the specific revelations about how any obstacle you put in the way of a shopper drops your sales figures. Any way you can make life easier raises your sales. This all seems sort of obvious, but most people running the businesses don't think it through.
Feedvisor: Very expensive algorithmic repricer that optimizes your margin by trying to win the Buy Box most of the time and takes into account other factors that affect who wins the Buy Box aside from price. Unlike any other repricer, it will raise your price (again, within limits) if you can still win the Buy Box despite the higher price. It also has a bunch of other great reporting and tools.
The company launched amazon.com Auctions, a web auctions service, in March 1999. However, it failed to chip away at the large market share of the industry pioneer, eBay. Later, the company launched a fixed-price marketplace business, zShops, in September 1999, and the now defunct partnership with Sotheby's, called Sothebys.amazon.com, in November. Auctions and zShops evolved into Amazon Marketplace, a service launched in November 2000 that let customers sell used books, CDs, DVDs, and other products alongside new items. As of October 2014, Amazon Marketplace is the largest of its kind, followed by similar marketplaces from Sears, Rakuten and Newegg.