The Orange Bowl in particular was the perfect storm of cheap Stubhub tickets, and soured lots of people on buying school tickets forever. For that game there were tens of thousands 3rd party tickets available, because scalpers bought out the stadium to guarantee themselves future playoff tickets.
Most bowls, the disparity isn’t that big. Best thing to do each bowl is just check the 3rd party supply before deciding. Right now Stubhub only has 4,200 tickets. MSU only sold 1,000 total (has 50 total left). This game is not going much under face value (unless you are willing to haggle with and pay cash to gameday scalpers, I am not doing that).