Possible Clues:

• Not the whole of the business of the sailor, by the sound of it
• Shopkeeper is one who complains about market refusing old currency
• One might do business with three blind mice
• One who sells goods to the geneal public
• Recipient of a trade discount
• Concerned with criminal trial to secure end of rogue trader
• Seller of gossip?
• Shop hand, one working on attachment thanks to farmer's wife?
• One passing on stories, a shopkeeper, possibly
• Rare tile (anag)