Current cheapest conference championship tickets on StubHub: SEC $289, Big Ten $20, ACC $2.
I'd attribute some of the Big 10's being due to Wisconsin being down. Although I'd be surprised if there wasn't a big Husker following like they always do. If it was OSU/Nebraska with something on the line and one of the conference's big names (like the SEC has with Bama today) the prices would be much higher. Just not an attractive matchup fan wise since UW isn't the Big Ten's 3-4 large fanbases and they're 7-5.