dealer
A person whose job is to sell things to others.
A dealer is someone who sells or distributes things as their business or job. In a card game, the dealer is the person who shuffles and hands out the cards to all the players, a job that rotates around the table so everyone gets a turn.
In business, a car dealer sells cars from their lot, while an art dealer buys and sells paintings and sculptures. Some dealers specialize in rare items: a coin dealer might help collectors find specific pennies from 1909, while an antique dealer searches for old furniture and treasures.