Google will show you plenty of theories and pointers for writing the perfect Craigslist ad. And Amazon has a few books on the subject as well (for instance, Make Money Posting Ads on Craigslist).
But I’m going to show you a real live unique Craigslist ad-in-the-making. I hope to list it there within 24 hours (just in time to sell the car this weekend, you know).
The rest of this post is The Ad itself. Read it. Study it. Learn from it. And Read it all