https://thegreatmodel8.net/

New to this subject. I have always like the looks of the Model 8 and Model 81. The Model 8 is a much sleeker rifle, but I understand it is a bit more fragile. I found what I think is a C Grade Model 8 at a local shop (rounded pistol grip). Just how prone are these things to breaking? Other than the beefier stock and forend, what is different about the Model 81? I want one in .35 Rem. and I see more 81s than 8s out there. Thanks!

Just how prone are these things to breaking

That's all relative really. Depends on how much use or abuse the rifle has had, how well it was taken care of, etc. There are a few differences, more so with very early 8's but late production 8's are near identical to 81's apart from appearance.

Model 8's are generaly more collectible than 81's.