seller,buyer etc.,

• Seller is one who sells something in exchange for money.
• Buyer is one who buys anything in return for the money he gives.
• Price is the sum of money paid for buying a thing or received for something sold.( accepted amount by the buyer and the seller.
• Sellers market. Goods are scarce and there is lot of demand,Money is plentiful with the buyers.Sellers are favored.
• Buyers market. Goods available in plenty and money is scarce. Only the low prices will attract the buyers.
• Peddler is one who travels about selling small things.
• Vendors are also those who sell small things.
• News-vendor is one who sells newspapers.
• Vending machine  helps us get small things easily by putting the right coins in the slot and getting what we want.
• you can get coffee, tea, drinks news-paper,cigarettes.
• http://www.youtube.com/watch?v=1k7br8xXMSU&feature=related