Yes, it's good stuff and probably worth $70-$80.
LC52 is a different story. The Chinese produced a bunch of .30 Carbine in the 1980's and spuriously marked it LC52. It's corrosive and poorly made with inconsistent charge weights. The only other corrosive Carbine ammo I'm aware of was the French made ammo. Because of the way the gas system was staked on a n M1 Carbine, you should never shoot corrosive ammo in one.