Because of the regime changes and hyperinflation that followed, these never really circulated for very long. Finding one with below XF details is actually challenging. The state of zinc deterioration tends to be the defining factor when assigning a grade.
That's definitely an above average 10 pfennig. The reverse is good. The obverse is a little rough from deterioration. If it were in my shop, I'd probably put XF on it. For me, surface smoothness and luster become the defining factors that take you up to AU/MS. Full details are expected.
These coins, in my opinion, tend to be under collected. I think nice examples should be worth more than they are. I suppose the interest just isn't there. You can find really nice examples for under a dollar. I bought an MS63 one with pretty good luster for 5 dollars. I have an MS64 one in one of my sets (
https://coins.www.collectors-societ...px?sc=369548) that is, as far as I know, a global top pop between NGC and PCGS for the type. I had to shell out 50 bucks for it, but it's the nicest one I've seen in over a year of looking. There may have been one or two on MA-shops that were nicer. It's hard to tell, but they all were priced several times higher.