What is the minimum buy-in poker?

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The buy-in to participate in poker games differs with the game and by the casino. The smallest buy-in of a cash game might be around $40-$60 at a 1/2 No-Limit Hold Em game whereas tournament buy-ins will of course be predetermined and can be quite small online to huge sums in the larger tournaments. Buy-ins are there so that everyone has a good amount of chips to compete.