Due to popular demand one person's request, I added for sale searching to my existing craigslist.org all-city search page. I also made a few other minor improvements:

• Searching of Jobs or For Sale items
• Selection of subcategories
• Age of posts in days is shown as an offset from today
• Very recent and very old posts are highlighted differently
• If location is available, it can be mapped via Google maps
• Minor speed improvements

Try it out! I'm open to any additional feature requests.

Except for an all-cities personals search, because that would be downright freaky. I just don't even want to know.