seller (n.)

• agent
• chandler
• clerk
• dealer
• drummer
• fishmonger
• floorwalker
• hawker
• ironmonger
• merchant
• peddler
• rep
• representative
• retailer
• salesclerk
• salesgirl
• saleslady
• salesman
• salesperson
• saleswoman
• scalper
• shopkeeper
• sutler
• traveller
• vendor