Last month (May 2016) I can bid for a Minolta lens on Ebay, which I previously had before: Minolta RF 5.6 / 250 mm. The lens is in mint condition and works very well on my Sony A7II.
The manual focusing is a pleasure with focus-peaking. But it´s not easy because of the small depth of focus. As my picture example proves you can get great results with this combination.