huckster

nouns

a seller of shoddy goods
cheap-jack, huckster
a person who writes radio or tv advertisements
huckster
is a type of (narrower)
someone whose business is advertising
adman, advertiser, advertizer

verbs

sell or offer for sale from place to place
hawk, huckster, monger, peddle, pitch, vend
wrangle (over a price, terms of an agreement, etc.)
"Let's not haggle over a few dollars"
chaffer, haggle, higgle, huckster