Starting August 31, Amazon will require third-party sellers of books, CDs and DVDs in the continental US to deliver their products to customers more quickly, within four to eight days. (The window has been from four to 14 days.) The new guidelines were announced in an email to sellers, explaining that “Customers are more likely to purchase products that have a faster estimated delivery time at checkout.” Sellers who do not meet guidelines risk bad reviews, reduced visibility, and even removal. The change will likely mean higher costs for sellers, many of whom rely on the post office’s cheaper, slower media mail […]