回复Jeffreycab：A useful starting point for <a href=https://www.reddit.com/r/AmazonFBAonline/comments/1vrqp2v/how_do_i_start_selling_on_amazon_need/>how to sell on amazon</a> needs to compare FBA and merchant fulfillment before ordering inventory, because storage, shipping, workload, and customer-service responsibilities differ. For books and media, edition, ISBN, condition, and fulfillment cost can materially change the result. Once the unit economics work on paper, the next step is a limited operational test.