Rokkorfiles review of 200mm F2.8 MD Rokkor.
http://www.rokkorfiles.com/200mm.htm
and.............
http://www.rokkorfiles.com/200mm%20Page%202.htm
"The 200mm f/2.8 MD Tele Rokkor is a very fast, high performing telephoto lens designed for use at wide apertures. It features high resolution, excellent corner to corner performance, and minimal vignetting for such a fast telephoto. While it does suffer from some chromatic abberation (common with lenses of this era prior to the general use of APO glass), this is only noticeable at 'grain sniffing' viewing distances on very large prints (A3+ and above).
I personally believe that the 200mm f/2.8 MD Tele Rokkor is one of the real jewels of the Minolta manual focus system, and despite its high price (US$350+ on the used market), it is worth every cent."
I would find the 300-S Teleconverter to embellish this jewel (if you do not already have a 400mm Rokkor MD).
This lens has a good reputation but priced ^^^^^
You are lucky to find one in restorable condition. I'd keep it and use it.
🙂