I just bought a case of Russian 7.62x54r ammo online. I have to tell you, I am a cheap bastard so I look every where before I lay down my cash. These guys had the absolute lowest price I could find. Even after shipping it was much cheaper than I could get at Cabelas or local gun shows.
I gave $139.98 plus $26.00 in shipping for 880 rounds. And it was here in four business days.
The place is called The Armory and they have all kinds of good stuff. They sell a lot of Russian made ammo in popular calibers. I know, the berdan primed stuff isn't reloadable but the prices are outstanding. For a bunch of backup ammo for when shit hits the fan, you can't beat it. They do sell the usual boxer primed, brass case ammo too, so check that out as well.
The stuff I got is in sealed tins that are great for long term storage. Not that this bunch will stay sealed for long. Shooting my Mosin Nagant is too much fun to let all this ammo just sit around.
Go check these guys out if you are looking for an excellent price.