You can get a real nice 210mm f/5.6 lens in a modern Copal shutter for around $200.00. Schneider, Rodenstock, Nikkor, Fuji, and Caltar are all great and pretty equal in quality.
Caltars are (or were) either Schneider or Rodenstock lenses with different labels on the outside. It just depends on the focal length and the age as to who was the OEM. So they're greatly underappreciated bargains.