huckster

(noun) a seller of shoddy goods. Synonyms: cheap-jack.

(noun) a person who writes radio or tv advertisements.

(verb) sell or offer for sale from place to place. Synonyms: peddle, monger, hawk, vend, pitch.

(verb) wrangle (over a price, terms of an agreement, etc.). Synonyms: haggle, higgle, chaffer. Example: "Let's not haggle over a few dollars."