Answer:
Maybe you could add on to it by telling his preparations for his trip. Does he take a boat, a car, a bus? That question would depend on the answer to this question; what time is he living in, also where is he living? Does the old man have a family that he has to take care of? Maybe it is his wife that is making him sell his goat. Why exactly is he so set on selling his goat? How many places does he have to travel before he finds someone to buy his goat? How long does it take him to travel before he realizes that money isn't everything? This information could all be added to the building of the story line. Also every good story has a moral so what is the moral of this story? Maybe on his voyage he and his goat grew a bond that could never be broken but he ends up selling his goat then realizes his mistake and makes the voyage back to rescue his beloved goat. Or he sells his goat for a large sum of money and finally finds someone who would buy it then he irresponsibly spends all of his money and has to live in misery for the rest of his life. You could practically do anything with this! So remember to be creative and everything sounds better when it's in your own words! I hope I helped some and good luck on your story writing adventures!