but Searchtempest.com lets you search keywords in all the Craigslist sites in a given radius. It's both useful and annoying as you can only sort by distance not relevance and there is so much variance in the way people name the items they're selling. Just keep your searches simple to make sure nothing you want slips through you net. Another trick is to click on everything so later when you're just quickly skimming for new ads everything you've already looked at is in purple or whatever color your browser uses.
In your case I'd simply search 'belt sander' and possibly ad brand names to thin it out a bit. Try different variations too.
I'll keep a look out in the first few pages around here. Can you give me a list of brands you're looking for so I can filter out the junk?