Hey, I had an extra ticket for Mean Girls a couple of weeks ago, and I actually found Craigslist as a very useful tool. WIthin minutes of posting, I received a number of messages and successfully sold the ticket, so you may want to explore that option. I know Craigslist can often times be a bit sketchy, but the buyer just asked a couple of questions to verify legitimacy of the ticket, and we met up before curtain to make the exchange. Every performance is also sold out, so you could probably sell to the cancellation line before curtain if all else fails. Enjoy the show!