I would trust it forsure, I know the store and know the sale, that said , #### surplus, they SHOULD (If same as last year) Have pretty much 30% off all ammo, or similar, if they have any non surplus 7.62, it will be MFS or barnaul for 170 500 rounds, with 30% off it will be around 120. (I only say this because wolverine supplies has surplus 7.62 of that same kind, 1440 for $209. 553 left, so you can buy that for that price anytime you like really, buy the NON corrosive while you can get it cheap ya know?)
http://www.wolverinesupplies.com/details/15034/Norinco-762x39-1440-Rounds.aspx
Get there REALLY early, last year , before I got there, there was a massive line up, and I missed out on all kinds of stuff, including any optics specials and all the SKS's they had, also , I got the last crate of 7.62 500 for 130 , and I got the last 500 rounds of 9mm, I think I paid about 80 bucks.
I see it now, barnaul for 139, get that, as much as you can, by it cheap and stack it deep. ESPECIALLY if you plan on shooting that unissued SKS , I only shoot non corrosive and STILL clean my SKS still its perfectly clean after every use.