COIN: A flat, typically round piece of metal with an official stamp, used as money.
BILL (MONEY): A piece of paper money worth a specified amount: a ten-dollar bill.
BARGAIN: A bargain is when you get good value for what you buy. When you get a bargain, you get a good deal.
ATM: An automated teller machine (ATM) is an electronic banking outlet that allows customers to complete basic transactions without the aid of a branch representative or teller.
MARKET STAND: Also known as 'market stall' or a 'booth' is a structure used by merchants to display and house their merchandise in a street market, fairs and conventions.
VENDOR: The word vendor comes from the Latin word vendere, meaning “to sell.” Vendor is a name for people *who sell things on the street*, such as a hot dog vendor, but it can describe those who sell any kind of goods or services, especially a specialized product.
CUSTOMER: A person or organization that buys goods or services from a store or business.
SALE: A sale is simply a discounted price. With a sale, you might still pay too much - Look, I got this ratty pair of jeans for $200. They were on sale - usually they're $250.
PRODUCT: An article or substance that is manufactured or refined for sale.
MALL: A large building or series of connected buildings containing a variety of retail stores and typically also restaurants.