If you mean "here" as in, on this forum, this is not a store
If you mean, can I sell my game based on CRYENGINE, this depends on your license.
FreeSDK license -> no
EaaS license -> yes
However, you should read your license carefully, because I am not a lawyer
After you finish developing your game, you can try to get a publisher to sell it for you, or you can publish it yourself over (for example) Steam or some other method. This part is entirely up to you, we just provide the engine for your game