The Salesmen are two salesmen who are possibly Harold and Nat. They try to sell something to a paranoid SpongeBob in Jellyfish Hunter. They both wear suits but one is black and the other is yellow and brown. They both also have briefcases and hats.
The Scene
(Paranoid SpongeBob walking home)
SpongeBob: It feels like somebody is trying... to sell-me-something!
Salesman (Hiding behind rock): I told you he was onto us!
SpongeBob (Running Away): I'm not interested in anything your selling!