You are right. I just decided to look at the details of the list. That scope you can get for $30-$50 on ebay.
$500 may have been a stretch estimate. Some of the ATI stuff, while decent, is dirt cheap. That may be $300 worth of parts, including the gun.
7.62x54r Mosin Nagant 91/30 (Purchased in Excellent Condition w/desirable “symmetrical” receiver)
ATI Monte-Carlo Stock
ATI Scope-Mount with Bolt Handle (Welded-On)
ATI Universal Featherweight Bipod
Custom-Fabricated Muzzle-Brake (Welded-On)
Full, Mirror Polished Bolt Assembly
Custom Shaved Iron-Sights (w/Weld-Filled Pin-Holes)
AMT GEN-1 Night Vision Unit.
Barska 50X Scope w/AMT Night-Vision Attachment
Custom-Fabricated Bolt-Pull-Ring
Custom-Fabricated Double-Extended Bolt Handle for Easy Operation Without Bumping Scope
Welded-On Side-Mount Picatinny Rail
Bed-Liner Coating on Barrel
1000mw Hi-Intensity Green Laser Sight
Red Laser Sight with IR-filter for use w/Night-Vision
Sure-Fire LED Flashlight
Custom-Fitted Rifle Sling
Winchester Buttstock Cartridge/Tool Carrier
I think that for $500 bucks, you can make yourself a heck of a sporter with a Mosin.