How much VBucks does Kratos cost?

Excuse me, could you please clarify something for me? I've been hearing a lot about Kratos and its association with VBucks, but I'm a bit confused about the exact cost. Could you tell me, how much VBucks does it typically take to acquire Kratos? Is there a set price, or does it vary depending on certain factors? I'd appreciate any insight you could provide on this matter.