Nick Fishkins is first seen on Patrick's television as the role of a house seller. Due to the conversational style of the commercial, Patrick believes Fishkins has really bought his house.
He is later seen on SpongeBob's television, causing SpongeBob to also believe his house has been sold.
Later in the episode, Squidward, after explaining what Fishkins does to SpongeBob and Patrick, decides to call him to come and buy his house. However, when he arrives, Squidward's house has literally been flipped, and Fishkins decides he does not want to buy Squidward's house.