How To Source Products In America. Learn how to buy and resell Amazon returns. Reselling products has exploded over the last decade on sites like Amazon and brand websites. If your gonna sell on Amazon FBA you have several sourcing options. The leader in the eyes of many is the private label process but in this instance buying Amazon returns and to be able to resell them can help you get inventory and build a base of products for newbies getting started. The tariffs have kicked off in-between China and the United States. The trade war seems to be in full swing and the manufactures in the united states and around the world are feeling the pain.