Marketing Mattresses Online What is Amazon best known for? Online shopping. Amazon began with selling books over the Internet and delivering them through the Post Office, UPS and FedEx. Now they sell almost anything, including beds, mattresses, pillows and sheets. More than just an online store, now Amazon is a marketplace, with manufacturers and distributors posting their products on Amazon. Likewise, eBay has expanded from an Internet auction site to a marketplace. In addition, eBay...