It has the typical soft Charlotte central device strike (noticeable on LIBERTY), but is unusually well preserved. There is only a trace of circulation on this one, and not nearly as much chatter as I would expect. The obverse is especially nice. Very few slab over AU-53, but this looks like one of the few. Add me to the AU-55 parade, and a bean on this wouldn't surprise me.
In this market, I have no idea on the price. The last 1847-C half eagle I handled was several years ago, and it was a well-loved VF. I know that AU and up are scarce enough that they trend closer to retail than Greysheet.