If you are interested in selling items online you need a reliable source of products to sell. These companies are called wholesale suppliers. A wholesale supplier buys items in large quantities from a manufacturer then warehouses them at various distribution points scattered around a geographic area such as the United States. This helps the manufacturer by moving goods from their warehouses to strategic locations throughout the area, and it helps the reseller by allowing a common place to buy items. For example, if you want to sell computer games, instead of having to deal with lots of manufacturers, you only need to deal with one wholesaler to fulfill all your orders.