ESPN's NCAA scoreboard has an interesting link next to each game, how much/many tickets are available on the secondary market.
Some examples from todays games, post 11AM, once the game starts the ticket link is gone.
Auburn at LSU. $19
TCU @ Kansas State $10
Purdue @ Wisconsin $18
GT @ Miami $6
Arkansas @ Bama $5
Ohio State @ Nebraska $18
Vandy @ Ole Miss $9
Some examples from todays games, post 11AM, once the game starts the ticket link is gone.
Auburn at LSU. $19
TCU @ Kansas State $10
Purdue @ Wisconsin $18
GT @ Miami $6
Arkansas @ Bama $5
Ohio State @ Nebraska $18
Vandy @ Ole Miss $9