Filtering search results on Craigslist

I started looking for a new rental house around Bangalore found that Craigslist, Click.in, Sulekha to be good. However the Craigslist was deluged with ads by agents. I did not want to avail the service of an agent, so created a search string by adding negative filters. Hereś how to go about: Usually the agents post a lot of ads and each one would have a contact number. In the search string, you can add - to filter out all the ads containing the same number. You can keep on adding such numbers/names and quickly get the posts done by the owners. It was very effective, as i was able to bring down the results to a few tens from hundreds.

sample search string:

sarjapur -990123456 -80123456