If Searchtempest is not currently working for you, it is because craigslist itself is down. I'm sure they will have the problem fixed soon, so please try back in a few minutes.
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As a fun side project, I'm thinking of making a little site to help you find dvd rentals. Basically you'd get a custom google map with the locations of all the blockbusters, hollywood videos, redboxes, etc., near you. Then you could enter a movie and see which locations have stock, the price, etc. Do you think you might use such a thing?
Obviously it wouldn't be groundbreaking, but I figure it could save a bit of time. Might look at linking it into Netflix and similar sites too, so you could compare with those options.
Hiding cities with no results relies on craigslist's RSS feeds. Very occasionally, a problem with the RSS feeds may cause cities with results to be hidden.
In that situation, you can use this option to override the test and just show all cities.
: The default - shows you the exact results from craigslist, but without having to go through hundreds of pages.
All results together - Google mode
: Saves a lot of time when searching a large area for something rare. However, it is based on Google's index, so the results aren't 100% perfect. (Works best in common categories and with multiple keywords.) Learn more here.
One city per page
: Devotes maximum space to the city you're viewing, but only shows one at a time. May be preferable when you're only searching a small area.
Mobile browser mode
: Just generates a set of large links to the craigslist results for each city.