Saxony coin (black silver)

Hi guys, hope you are well. Do you think that a silver coin with black patina has more value than a white one that looks cleaned? Could a medieval silver coin have been cleaned and then someone used artificial patina? What do you think about this coin? Thank you all.

Hello,

The coin looks fine to me. I personally just prefer a coin with a patina that isn't distracting, but I don't really mind either way. Is this your coin BTW?

No, no, just thinking in buy it. I’m trying to buy something interesting apart from Transylvania because Transylvanian coins are too expensive and too hard to find.