A charity shop (British English), thrift shop or thrift store or opportunity shop or op-shop is a retail establishment run by a charitable organization to raise money. Charity shops are a type of social enterprise. They sell mainly used goods such as clothing, books, music albums, shoes, DVDs, toys, and furniture donated by members of the public, and are often staffed by volunteers. Because the items for sale were obtained for free, and business costs are low, the items can be sold at competitive prices. After costs are paid, all remaining income from the sales is used in accord with the organization's stated charitable purpose. Costs include purchase and/or depreciation of fixtures, operating costs and the building lease or mortgage.

Used goods, also known as secondhand goods, are any item of personal property offered for sale not as new, including metals in any form except coins that are legal tender, but excluding books, magazines, and postage stamps. Used goods may also be handed down, especially among family or close friends, as a hand-me-down.