Are you asking how to buy the Alex Music Box in csgo? Purchase in the mall or market.

csgo Alex music box can be purchased in the mall or the market. In addition, a music box can be randomly selected from the music pack.

csgo is "Counter-Strike: Global Offensive", formerly known as Counter-Strike: Global Offensive. It is a first-person shooting game jointly developed by VALVE and Hidden Path Entertainment and published by Valve Software. It was released on August 21, 2012. It was officially released in Europe and the United States, and the national server press conference was held in Beijing on April 11, 2017.