I've only used Craiglist to find apartments and sell my old furniture. I never realized that it offered so much random hilarity. You must check out The Best of Craigslist.
It includes such gems as:
Hideous, Mean, Saggy-titted Cur
INTELLIGENT, cultured, 22y/o wm seeking Asian women (pref. Nihonese)
An Open Letter From Your Local Adult Store Clerk
You were being shoved into a Dallas Police car. - m4w
These postings are all pretty funny, but they kind of make me want to stop using the internet...
Discovered via dooce