Where to get CS:GO cases?

Getting CS:GO cases is pretty straightforward. You can earn them as random drops by playing the game - just hop into some matches and keep playing, you might get lucky at the end of a game! Another way is through the Steam Market, where players sell cases they've received. Prices vary depending on the rarity and demand for the case. Lastly, you can sometimes get them through promotions or as part of the rewards from the Operation passes that come out periodically.

My buddy got a super rare case after a match once. It's all RNG, but yeah, playing the game's your best bet if you're not into spending cash.