Before spending money, keep these current market restrictions in mind:
There are three main ways to acquire keys, depending on whether you want to open a case immediately or collect rare "legacy" items.
Click the green price button to purchase the matching key directly through Steam.
: You can no longer buy "new" tradable keys here. However, you can find legacy keys purchased before October 2019. These are much more expensive (ranging from $8 to over $20 ) because they remain tradable and are treated as collector's items or investment assets. Vital Rules to Know Before Buying
: The easiest and most cost-effective way for most players.