Just How to Drop Ship. First allow’s describe what it is to drop ship. Basically retail arbitrage is the method of buy low, offer high. You can sell products on offering platforms such as eBay, Amazon, or Treasure trove. These are on the internet retail platforms that enable sellers to list a product up for sale on their platform(site) for a cut of the sale. Each on-line merchant has a different % that they extract from each sale.