There have been a bunch of Swede Rolling Blocks landing in North America of late.
I think that the 8mm (8x58RD) Swede's are considered C&R or Antique in the US (may be wrong!) and are in pretty good shape on average.
Take a look at the Simpson Ltd site. IIRC they list them as "318" caliber. These were military guns that were too late in the scheme of things to see active service after an arsenal refit, were put into storage, then converted to Forester's rifles (Foresters were the Swedish equiv. to a Conservation officer, more or less), then they were sold out as surplus.
Good solid actions!
As much as I want an 1885, I can actually afford a Swede roller.
Cheers
Trev