I used the craigslist in Madison WI and I got a lot of leads from it. I can’t say the same for Dallas and Washington DC. This tells me that the market is very different in these 3 cities and the way of people looking for trainers differs from city to city. But I’m sure others have different experiences with craigslist. It’s an easy and cheap way of advertising so I can’t complain since I didn’t have to invest anything to it.