I scanned Craigslist, but saw nothing promising, so I posted a listing looking for a single ticket.
I posted something to Twitter, bemoaning the fact that the show is sold out. A friend commiserated, and said she'd tried to get tickets to but couldn't.
My phone rings. It's someone from Craigslist, offering me two tickets at face value. I only need one, but can I call you back in a little bit if I want to take both?
Sent the friend a tweet asking if she wanted the other. Yes! Called the guy back and made arrangements to buy both tickets.
The whole thing took about 15 minutes.