 Buy bets are placed with the shooter betting at a specific number will come out before a player sevens out.The buy bet must be at least table minimum excluding commission, however some casinos require the minimum buy bet amount to be at least $20 to match the $1 charged on the 5% commission.Traditionally, the buy bet commission is paid no matter what, but in recent years a number of casinos have changed their policy to charge the commission only when the buy bet wins.