I have the opportunity to buy a Win 1885 takedown in 32-20. The condition is better than good. The wood is clean, with some finish wear and scratching, but no missing wood (gouges, chips, etc.). Case color is very good, bluing likewise. Bore is like a mirror.

Any rough idea how much something like this is worth?

You ask why a 32-20? Why not. I like single shots, especially old ones.