A huckster is anyone who sells something or serves biased interests, using pushy or showy tactics. In historical terms, it meant any type of peddler or vendor, but over time it has assumed pejorative connotations.
Women huckstering from The Irish Sketch-Book, 1845
Itinerant medicine salesmen were often known as "hucksters"
Hearing Before the Special Committee on Aging. United States Senate, 107th United States Congress. First Session. Washington, D.C. Serial No. 107-14.
A peddler, in British English pedlar, also known as a chapman, packman, cheapjack, hawker, higler, huckster, (coster)monger, colporteur or solicitor, is a door-to-door and/or travelling vendor of goods. In 19th-century America the word "drummer" was often used to refer to a peddler or traveling salesman; as exemplified in the popular play Sam'l of Posen; or, The Commercial Drummer by George H. Jessop.
A Peking fruit seller, c. 1869
Peddler in Ho Chi Minh City, Vietnam
Three East Karelian "laukkuryssä" peddlers from Kestenga, Russia in Lohja, Finland in the late 19th century.
Ribbon seller at the entrance to the Butter Market, engraving by J.J. Eeckhout, 1884