A new delivery service offering from Amazon, entitled Seller Flex, that received a lot of attention when various reports were published about it in early October could prove to be a major competitive advantage for the e-commerce bellwether in terms of how it negotiates rates with the parcel duopoly of FedEx and UPS, coupled with being able to pull data from warehouses to examine delivery times, performance standards, and costs for a transaction. That is the thesis from James Thomson, a former Amazon executive and now a partner for Buy Box Experts, an Amazon consultancy firm, and author of the book, “The Amazon Marketplace Dilemma.”