InterOrdnance (I.O. Inc.) has them for $400 (www.ioinc.us).  The web site says these are 1943 or 1944 dated rifles, but they may have been made-up from post-war stocks of Model 91/30 rifles and surplus PU scopes.  The $400 price is much more attractive than the $800+ gun show price. 

 

Genuine M91/30 sniper rifles can be found with either the PE-series or PU scopes.  The PE-series scopes were 4 power with 30mm tubes.  These scopes were copies of the German Zeiss optical sight.  The PU was a simplified, Russian-designed scope for the SVT-40 sniper rifle.  PU scopes were 3.5 power and had 22mm tubes.  The PU was easier to produce than the PE-series scopes and became the dominant sniper scope from 1942 onwards in Russian service.  Most of the rifles advertised as Mosin-Nagant M91/30 sniper rifles are equipped with the later PU 3.5 power scope.

 

The problem with the genuine WW2 rifles is that they'd be pretty well trashed by shooting of corrosive 7.62x54R ammo.  Unless the rifle has gone through an overhaul at a depot and hasthe barrel replaced, you could probably cover your group with a sombrero with a genuine rifle of that era.

 

Rifles selected as sniper's rifles by the Russians were those that demonstrated a greater degree of accuracy than the average infantry rifle.  They were fitted with a bent-down bolt handle and either the PE-series or PU scopes.  Whether any kind of specific "accurizing" was done to these rifles is unknown.  The scopes used on the rifles (PE-series or PU) were adequate for the time (1930s-1940s) but in no way are equivalents to the average hunting scope purchased from K-Mart or Wal-Mart for about $100.  Powers were fixed at 4 or 3.5 power, reticles were large, optical glass wasn't the best nor was the scope nitrogen-filled to prevent fogging.  However, the scopes were rugged enough for combat operations and they filled that role well. 

 

Soviet snipers generally used military ball ammunition and it varied in accuracy.  Soviet snipers would try to find production lots of more accurate ball ammunition and then use it for sniping purposes whenever possible.  Post-war, a dedicated sniper round, the 7N1 was adopted for the SVD (Dragonov) self-loading sniper rifle in 1966.  The 7N1 was superseded by the modernized 7N14 loading in 1999 and is the current sniper cartridge.  The 7N1 and 7N14 cartridges use a 152 grain, full metal jacket, boattailed bullet with a muzzle velocity of 2,723 fps.  The difference between the 7N1 and 7N14 rounds is the bullet; the latter has greater armor piercing ability than the former.  The 7N14 bullet can penetrate 10mm Grade 3 steel plate 100 percent of the time at 250 meters.

 

Assuming that you find the Model 91/30 sniper's rifle of your dreams, to get the most out of it in the accuracy department, try to find good, recent-manufacture commercial ball (148-150 grain) or Match or military 7N1 or 7N14 ammunition for it.   Example:  Wolf ammunition makes both a 148 grain ball round and a 150 grain sniper equivalent (called Wolf Gold).  Other manufacturers are: Norma, Sellier & Beliot, Winchester, RWS, Prvi Partizan, Igman, and Barnaul.

 

The heavy ball (180 to 200 grain) rounds have much greater recoil without any kind of increase in accuracy. Use of heavy ball ammunition in self-loading rifles like the SVD, Tiger, PSL (Romak 3, SSG-97, FPK), or NDM-86 beats the daylights out of them, so stay in the 148 to 152 grain weight of bullets and you won't have any problems.