A pen identified as a fake has no collector value at all. Such pieces change hands in China for something between about 50 cents and one euro; what a previous owner paid for it has no bearing on its worth. That disposes of the question of price, and of the model as well, since fakes often carry entirely invented names or mix together features from several different series.
There is also the fact that selling counterfeits is not permitted in Germany. That holds even where the pens were bought or inherited in good faith and are to be offered expressly as copies; listing them invites a claim from the trade mark owner. Pieces from an estate can therefore be neither sold nor sensibly valued. If there is any doubt about an inherited pen, have it examined before selling, most easily at a boutique or an authorised dealer; experienced collectors will usually spot the common fakes from the imprint, the star and the nib alone.