If you have any interest in riding this bike or a "French" bike of this vintage, clean it up, soak it with WD-40 and put it away till you find another "French" donor bike with a clean crank set, functional drivetrain and hopefully aluminum rimmed wheels. If you have the tools and knack, build a bike from the 2 and add $50 for tires, tubes and cables, you might have a $100 bike. If your really into detailing, you might be able get more for a well polished "restoration" I think you can get $20-25 for the brakes if you "part it out". It is an intrinsically cool bike so well worth saving, but not something to try and make a buck on.