Craigslist Philadelphia Classifieds
From the Craigslist Factsheet:
Q: What is craigslist?
A: Local classifieds and forums - community moderated, and largely free.
Q: What can I find there?
A: Jobs, housing, goods, services, romance, local activities, advice - just about anything really.
Q: What is the origin of craigslist?
A: An email list of SF events started by Craig Newmark in 1995.