I Am a Black-Hearted NPC in the Game

"Brother, I think you have the qualifications of a great emperor. What a coincidence. My ancestors have passed down a treasure that will last for thousands of years. I am destined to you at first sight. I don't want 999. I don't want 99. I only need 9 gold coins and you can take it home." Cao Xin took out a shining golden dagger from his backpack, which seemed to be of great value. By some mistake, the player bought the dagger in Zou Xin's hand. The transaction was successfully completed. When the buyer walked away, Cao Xin slowly took out a rusty iron sheet. After some manipulation, a brand new dagger appeared. Caoxin stood up slowly and went to other games... Looking for the next person. (Also known as: I am a black businessman in the game)