Gao Yang was quite proud of securing a big advantage from his negotiation with Uriyangko, even Glolov kept praising the results of his negotiation endlessly. According to Glolov, getting Uriyangko to provide equipment at cost price was essentially the same as making money, and it was making big money at that.
The arms trade probably had one of the highest profit margins of any industry, and Uriyangko dared sell an AK47, which would be overpriced at 500 US dollars, for 2000 US dollars. Even during wartime, that was a notoriously ruthless price among arms dealers, making him the villain among villains. Being able to convince him to sell his goods without making a profit—and when Uriyangko didn't even have stock, requiring purchasing before he could sell to Gao Yang—was definitely a great achievement for Gao Yang. The difficulty was no less than making a kill shot from a kilometer away.