A reseller is like a person who buys things from a store and then sells them to other people for a bit more money. Sometimes, the reseller will buy things in bulk, like many toys at once, and then sell them one by one to make a profit. Other times, the reseller might find something that is really popular and hard to get, like a rare collectible, and then sell it to collectors who really want it. Resellers are like mini-businesses that make money by buying and selling things that people want.