Old Schwinn bikes value up to $1000 if they have extra features like cantilever frames, horns, fenders, saddles & back racks. You’ll usually get the earliest 1850s models for $300 – 1200. Of these, the ones with Cantilever or Stingray frames cost more. New & Streamlined Schwinn models, such as those with BMX frames or Knobby tires, cost $40 – 900.