I had a pair of Buffalo Classics for a time, wish I would have never sold them - back then they were easy to find, and under $300!!! I had the 45-70 and the 38-55. I put a Marble full buckhorn on the 45-70, plus a Marbles tang sight, then eventually a Smith ladder sight to use for SASS/CAS long range side matches.
They're pretty light if you put a lot of powder behind heavy bullets in the old 45-70 cartridge, so I'd recommend a good recoil pad - which kinda sucks, since the crescent butt is rather attractive to look at. They were accurate enough, mine was less picky about ammo than my Marlin 1895 Cowboy was, although not quite as accurate once I found the load that the 1895 liked. I suppose it's VERY fair to say that I didn't shoot the Buff Classic as well as I did the Marlin, since the handling of the single shot was very, very different. The Buffalo Classic was plenty accurate though, I did a bit of hunting with mine, just to say I did. Single shots just aren't for me, but I'd love to have another Buff Classic - just hard to find, and a lot more expensive than they used to be!