I stumbled upon an interesting site today, it's called scorebig.com. It's essentially like priceline.com, except for sporting event tickets. Anyway, they are in beta now with a waiting list to signup, but you can use the referral link below to sign up right away. You'll get $10 off your first purchase (in interest of full disclosure, I get $10 bonus if you make a purchase). It's free to signup, don't need a credit card.

http://www.scorebig.com/referral/jeff50