An RSS reader delivers "feeds" to you from web pages that are so-enabled. For example, all the Mindat fora have RSS feed capability,although I prefer to wade through those the old fashioned way that most all of us surely do.
For reader software, just google RSS reader for many free readers. I'm new to RSS and chose SharpReader for no particular reason that I can recall, but it works well for me.
So to RSS hunt Craigslist(CL) for what you're looking for, go to your most local CL site and type in a search for say "Genie". Once the results (if any, or even if not..) show, click the orange RSS thing at the bottom right. This will lead you to a jumbled looking page, just copy and paste that URL into your RSS reader, name it something like Genie in Ray'sTown. Then when anything that pops up with "genie" in it, you will be notified without having to search CL daily (assuming you let the reader run all the time). You'll surely get false positives, using genie as an example, there appears to be a diaper genie out there (5 hits in my area alone!), I didn't click further, but be advised that CL doesn't allow further filtering ala "genie -diaper" to exclude those surely stinky diaper genies...
I mainly see it as a Used Equipment sort of tool, I don't expect that one would monitor CL for the random blue-stripe euclase, for instance, but I did set one for "rock collection" a couple weeks ago and what do you know, I actually got a hit for one this coming weekend very locally. We'll see what that brings....
Hope this made sense and if not I'll go into more detail.
Mineral and Locality Search
