There's always the possibility of getting cheap tickets to stuff that hasn't sold out, although why you would pay anything to see Red & Meth do Right Guard commercials is anyone's guess. Helping you get cheapies to whatever events you want: ScoreBig.
Not actually dedicated to hooking you up with plus-size models, ScoreBig's a members-only service run by former Ticketmaster and pro sports league insiders that saves you up to 70% off face on tickets for sports, concerts, and other events by letting you name your own price for unsold tickets, which they've sourced using relationships with sports teams, promoters, brokers, and venues, meaning you can finally start paying less for Dome. Select events by category, date, or name, then choose your seats, and before making your offer, check both the retail price (including all fees) and a box displaying the amount other users have saved in the last 24 hours, ranging from the 10% "Big Deal" to the 50% or more "Biggest Deal" -- a status GA's new governor plans to lose with the arrival of his new Bowflex. SB'll immediately let you know if your offer was accepted, and'll inform you whether they'll be emailed, shipped, or if you're picking them up at will call; if your offer's rejected, SB will either let you bid again after 24 hours, or might even reply with a counter-offer, although a flat Formica surface probably won't cut it if you wanted Justin Bieber tickets.
Current options include next Wednesday's Hawks-Bulls game, plus musical shows from the Tabernacle performance of All Time Low in April, to Janet Jackson's end-of-March show at the Fox, also a network that'll presumably have a show starring Red & Meth hilariously adopting like twelve kids before too long.