I would not buy a Mosin Nagant online. I went through 2 cases of rifles before I found one that worked like a new rifle. I have a 1930 hex receiver Mosin. Some were shot out. counter bored, stiff actions or a trigger that godzilla coundn't squeeze off. If you can find one locally I would go for it. The more you clean it and the more often you shoot it the better it will shoot. The rifle I have was the ugliest rifle in the box. But the internals looked like new. I can refinish it and fix the ugly but finding an 80 year old rifle that looks like it had never been shot internally takes a lot of leg work.
We're going to Cabelas tomorrow because they have a sale on them. I'm hoping that I do find two good ones!