My suspicion is not many. Cheapest tickets on the day they went on sale were $185; now they're less than $100 for those same nosebleed seats. I also suspect that given we played Wisconsin here earlier this year and open against USC, a lot of Tide fans are going to skip Dallas both because of that AND the fact some are saving their money presumably for the championship game (as uh happened last year).
It will be impossible to expect fans of teams playing two games in a four-game playoff to consistently fork over boo-koo bucks year after year. Keep in mind the SEC title game is usually more expensive than this year, too (and would have been if Florida had beaten FSU).
I live here and I'm debating it, but I hesitate to miss the first game and go out into that monstrosity as much as I'd love to do so. I went to the Michigan game and had a ringing in my ear for three days.