If so, why is it so cheap?
The "match" wording can mean a lot. In the case of Georgia Arms, since I have used their product, I would take it to mean that the deviation of bullet weight and powder charge is likely to be much less between rounds so that you should, in theory, get tighter groups.
It is cheaper because the brass is once fired, not new and because Georgia Arms is working on a lower profit margin probably. Also the bulk packing saves a little.
Also, Ammoman has just put up some Lithuanian surplus on his website. I ordered some of this, it's very good ammo.
It's probably better than the Igman becuase it also has reloadable brass but it's actual NATO headstamped brass which means it's thicker.
Well I am assuming it's NATO stamped. The ad says "full NATO spec". I ordered some, we'll see in a few days.
Take into account that this brass, being reloadable, is worth a dime each so you really can take $100 off the cost of this ammo if you reload to sort of soften the blow of buying it. 1000 rounds of NATO stamped once fired brass isn't exactly easy to find these days either.