What are the rarest cars that are almost worthless?

Rare doesn't always mean valuable, so there are some cars that are rare but not valued very high because they were shitty even when new or were unpopular. I think the Oldsmobile Omega SX is such a car and might actually be almost nonexistent today. The standard Omega was not particularly popular when new and I have only ever seen one in person, but on Google images, I could not find any pictures of the SX that were not for advertising. Probably a $2500 car at most since it is forgotten, comes from a bad era for American cars, is not attractive, is not culturally or historically significant, and was really nothing more than a sport appearance package. via /r/cars http://ift.tt/2t7OWY4