Recommended: Worth Repairing. Estimated Value: $900. Repair Cost: $50 (Aperture service). Market: Extremely high value (81 transactions). Condition: Good - glass clear, caps included. Key Features: Ultra-wide 15mm, premium German optics, Contax mount for Rolleiflex SL66. Ideal for landscape photographers. Next Steps: Aperture lubrication, cycle aperture ring, check blades for oil.