To resell means to sell something that you've already bought from someone else. If you buy a bicycle at a garage sale and later sell it to your neighbor, you're reselling it. You're not the original seller (like the bicycle manufacturer or the first owner) but a middle person who bought it and then sold it again.

People and businesses resell items for different reasons. Some stores buy products from manufacturers and resell them to customers at a higher price, which is how most retail works. Your local bookstore buys books from publishers and resells them to readers. Individuals might resell concert tickets they can't use, or outgrown clothes at a consignment shop.

Sometimes reselling becomes a small business itself. A person might buy used video games at low prices and resell them online for a profit. Antique dealers buy old furniture and resell it to collectors. The key is that the reseller is not making or creating the item, just serving as a link in the chain between the original seller and the next buyer.

The practice can sometimes cause controversy, like when someone buys many popular items just to resell them at inflated prices, making it harder for regular customers to buy what they want at reasonable prices.