I have the Schneider 210/5.6 Super Symar HM I bought new in 1988. It was an expensive lens. It was one of Schneiderís most sophisticated lenses at the time and is a great deal more sophisticated and valuable than a simple 4-element Tessar design.
It is designed to cover the 8" x 10" format but, of course, can be used on smaller format cameras as well provided that it fits. The quality of this lens is excellent.
Filtering may be something of a problem due to its 100mm x 1.0mm filter thread.
If the price is low and itís in good condition, you should buy it quickly before someone else does.