The resale business model involves purchasing goods and then selling them at a markup to customers through an online resale platform like eBay, an online storefront like Etsy, or by selling directly to a brick-and-mortar thrift store. For example, reselling niche fashion items will likely be easier and more profitable on a site like DePop than on a platform focused on new items like Amazon, while you'll probably have more success reselling electronics on eBay than through an antique store. The amount of money you can earn as a reseller depends on how you resell, what you resell, and how much time and effort you put into your business.