pitchman

A hawker of small wares, as on the streets or at a carnival.

One who makes aggressive selling or promotional efforts.

One who delivers commercials on radio or television.

A salesman, especially, one who aggressively markets wares from a street stall, or a carnival or side show act.

an aggressive salesman who uses a fast line of talk to sell something

someone who travels about selling his wares (as on the streets or at carnivals)