My DH buys tickets all the time on craigslist (it's how we often go to theater and concerts at a discount - we wait until very last minute!). And we bought our dining room set through craigslist.
But, we gave up trying to sell things - or even give them away - through the site. It's just too much of a nuisance.
For example we sold two dressers via craigslist to a woman who, it turned out, lived only a few blocks from us. They were very heavy dressers. The woman came over to see them first. Because they were so heavy, she took out two of the drawers and popped them in her car, saying she'd come back later that night when my DH was home, and she'd bring a friend, so they could be moved.
Well, she never showed.
We waited and waited. We had no choice but to sell them to her, because she'd taken the drawers!!!
Finally, my DH called her and said "I'm leaving them on the curb - get them before 11 AM when the trash truck comes." This was days later.
She threw a hissy fit, whining about how she couldn't fit them in her car, yaddah yaddah. Anyway, ultimately, he hauled them over to her house - and dropped them on her lawn. And he told her to just take them for free.
She then called him back and ranted and raved - because it rained on them!
The nerve.
Anyway, that is just ONE bad example. We gave up.