I've had both good and bad experiences on Craigslist. For example, I recently sold my Mini Cooper on the site. I was honest about the expensive repairs the car needed, including a new transmission, and I listed the car accordingly at a low price. Within one hour of picking up the vehicle, the buyer posted it for sale again on Craigslist — at a much higher price and without any mention of its significant mechanical issues. (Read "Is it safe to sell your iPhone on Craigslist?" for another Craigslist horror story.)
However, Craigslist also has many good attributes for buyers and sellers. It's free to use, for instance, and the site offers a huge potential marketplace, depending on the size of your local community, of course. But you should be cautious about the types of payment you accept and read Craigslist's "avoiding scams" page before getting started.
Sign up for Computerworld eNewsletters.