A person who sells herbs to be used as medicine is typically called an herbalist or a herbal practitioner.
An author is a person who writes and sells books.
The person who sells drink is known as sellsmen
baker
A bookie. Droll. You could call that person a bookseller or shopkeeper.
You call a person who sells flowers a (Florist)
A person who sells ship supplies is called a chandler
A person who sells jewels is called a jeweler.
fishmonger
A chandler.
A butcher.
A florist.
A "Shipbroker".