It's not easy selling an F car. There are so many people 'interested' in buying an F car, but in reality, there are few that will commit. The two F cars I had got traded in.
What have you priced your's at? At the end of the day, like anything, if it's priced right it will sell, but an F car..... generally it'll have to be a competitive price to sell privately, especially when so many people buy German and utilise cheap PCP.