Honestly? Unless it's crazy hard to obtain and/or you are getting some crazy deal on it, I would say just get a new one. IDK how easy it will or will not be to obtain a regular pin and etc.
Also, I have a slight bias against sellers who are selling something where they don't keep the box and all the spare parts together, and I am, myself, fairly high on the disorganized scale. But, if I'm selling something it is gonna come with all the original parts.
Anna