I used the RSS to find vintage radios to add to our ever growing collection. Now, I don't have to keep checking back in to craigslist, I can just look at my RSS.
To show my affection for this amazing tool, I've added a new feature to the Apt. 528 sidebar. Under "Item of the Week" you can find "Found on Craigslist" where I'll post random search feeds. I might change it up daily, weekly, or just whenever I remember....we'll see!