My son and I drove to the IMA store in Easton, PA today to look for 2 Martini Henry MK IIs. They had about 25 Mk IIs, most with wrist cracks, some very serious. We found maybe 3 that had butt stocks without cracks. I ended up with a nice 1876 Enfield Mk II and my son grabbed an 1876 LSA with a cracked stock - but one that looks to be repairable.
They had a bunch of Mk IVs - including an entire pallet that were in very nice condition. We really wanted Mk IIs because of their service use by the British Army.
There are just a few gouges on the butt stock and perhaps a little wood rot around the rear forearm pin. The only issue I'm a little concerned with is some pitting and rust on the right of the barrel. That may keep me from shooting it - need to see how bad it is before I decide.
Both rifles function even with all the caked-on gunk.. The bore on my sons is beautiful. Mine is caked with gunk but seems to be OK, too.
Here are a few pre-cleaning pics of mine. I did just a very little bit of cleaning of the butt stock tonight and found some very nice cartouches.