Recommended: Worth Repairing. Estimated Value: $1,500. Repair Cost: $100 (Full CLA). Market: Extremely rare (5 comps in 12m). Condition: Good - glass clear, serial visible, aperture responsive. Key Features: Legendary East German optics, f/2 ultra-fast aperture, Contax RF mount. Ideal for portrait photographers/collectors. Next Steps: Professional CLA focusing on shutter/aperture. Verify aperture smoothness, check for haze.