There are a lot of cases on the Steam market. Every year their number only increases. In fact, they have flooded the in-game item trade market. During the game, you can get 3 types of cases: black (classic), yellow (community), and esports. In https://bloodycase.com/blog/10-best-csgo-cases-to-open/ tried to talk about each of them in detail and also argued why they were chosen.