You don’t have to invent a product and go through everything that comes with that. You find a product that’s the wrong price in one place and sell it at the right price in a different place. This guide is going to cover more than the standard method and explain all three. Reselling is an e-commerce business model where you buy an existing product from an existing brand at a lower price and resell those products for a profit on marketplaces like Amazon, eBay, or Shopify. A private label means you actually create and produce a product with a brand attached and hope there is a demand.