You asked

Is the voigtl nder color skopar vintage line 21mm f 3 5 aspherical worth buying used?

Here is what the site says about that.

From Voigtländer Color-Skopar Vintage Line 21mm f/3.5 Aspherical: Voigtländer Color-Skopar Vintage Line 21mm f/3.5 Aspherical: A prime lens by Voigtländer for Full frame cameras, 21mm f/3.5. Specs - Maker: Voigtländer - Focal length: 21mm (prime) - Maximum aperture: f/3.5 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 21mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Buying used: Buying used: Cameras and lenses are built to last, and many photographers upgrade often. That makes the used market one of the best ways to afford good gear. A body that's one or two generations old is often most of the camera for a fraction of the price.

Quoted from this site's pages.

From these pages