If you're a regular Amazon shopper, you've probably already noticed that prices of certain products on Amazon could change very frequently.
Amazon's mission is to provide the lowest possible prices. If Best Buy, for example, drops the price of a popular video game one day, you can almost guarantee that Amazon will match it within the next 24 hours. But Amazon doesn't just compete with the big guys.
Amazon itself is also a marketplace, where third-party sellers (which could be big businesses or just individuals) can sell their own private label products without competition, compete with other sellers, and even compete with Amazon itself.
The Amazon marketplace makes it very easy for individuals sell their products as the site gets millions of visitors per day. I've sold stuff on Amazon myself, such as old books and video games, both used and new. It was quite ...