I was at Dunham's last night looking for the girlfriend's birthday gift (Savage bolt in .223). While there I took a look at some of the older rifles they had up for sale. One was a Mosin Nagant 91/30 on sale for $90. I know that they shoot the 7.62 x 54 ammo but was wondering if there is a specific type this rifle will shoot and where can I get surplus if that's what it needs? Also, what should I be looking for on one of these rifles to see if it's in good shape? I'm guessing this was a good price because what rifle can you get for under $100 these days. Thanks in advance for any help.