I have been buying off Craigslist for years. Most of my buying has been of photography gear. I think I am up to five or six cameras three of them digital, far too many lenses to count. Tripods, stands, lights almost everything I have in my studio is from Craigslist even the studio doors. This afternoon I’m buying a speed ring for my Alien Bee strobe.
One of the side benefits of buying used other than the price savings is the people you meet. One of my best friends I meet on a CL deal. Some of my best photographer contacts came from buying gear from them first and getting a chance to talk to them. It’s a way to get connected to the area around you and meet those outside of your circle.