"These are by far the cheapest blue-light-blocking glasses that I've found, and they work really well. I was having headaches nearly every day of my last semester of college from working full-time and taking night classes — both of which relied heavily upon screens. These were truly lifesavers, and I've rarely gotten so much use out of $9. I've written a review of them before, and I'm wearing them now." — Mara Leighton
In October 2016, Amazon Music released a music streaming service called "Amazon Music Unlimited." Unlike Prime Music with its somewhat limited catalog, this stand-alone music streaming service has "tens of millions" of songs and is intended to compete with music streaming leaders such as Spotify and Pandora Radio. It has a similar price structure, albeit with a $2/month discount for Amazon Prime members.
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.