One of the most daunting parts of selling online is deciding what products to sell. A bad decision could leave you stuck with a lot of inventory, forcing you to sell it at a loss. Slow sales are just as deadly, as the lagging products take up storage space. Anything with an expiry date brings with it a whole new level of stressful urgency. When you use drop shipping the pressure is far less than if you had to order hundreds of items for in-house inventory, but product selection can still be a massive undertaking.