"When the NCAA implemented a permanent 12-game schedule for FBS teams in 2006, it further changed the non-conference scheduling landscape. Teams went scrambling to find guaranteed games against FCS opponents to fill the schedule because any FBS program with a non-losing record is eligible for a bowl game. Kramer says FBS teams can pay less money to schedule a home game against an FCS program, whereas playing another FBS school can cost roughly $1 million. "
on another site "$483,000: Average price for Florida, Alabama and Georgia's FCS games this season. Florida paid $500,000, Georgia and Alabama $475,000 apiece."