Classic usually has the 5's and 10's but they are OOS at the moment
https://www.classicfirearms.com/vepr54r10mag
Atlantic also has them in stock.
http://www.atlanticfirearms.com/component/virtuemart/shipping-accessories/vepr-7-62x54r-10-round-magazine-2-pack-detail.html?Itemid=0
Ultra set up is the Leatherwood CMR AK7.62 with a Midwest Industries SVD 30mm mount love it on the type II 16.5 Vepr 7.62x54R
http://www.midwestindustriesinc.com/index.cfm?fuseaction=category.display&category_ID=1245...
I did get offers over $150, but took me long enough to attain those (they are prestine), I am not going to let them go for less than or even to what I purchased them for. No worries.
as funny as this thread is I had a five line and a ddr listed a few days ago, people still wanted to give me prices what they could buy a round reciever online... I just took them down since I am not pressed. Probably better left in the collection than bubba'd anyhow...
thing is the dudes in the forum have not wrote a book about it..... idk but IMO from my experience being a moderator on an automotive forum. I have listen and read all sorts of laughable theory. I work in the automotive industry as well and nothing makes me start laughing harder then the client...