So far my dealings with local CL have been mostly good. I've sold 6-7 bikes and bought 2-3.
Every single time I have had someone come look at one my bikes they have purchased it. Only once have I had to discount, too. Yes, I've had the occasional no show, but that comes with the CL territory. What I don't like are the inquirers who try to price negotiate via email, without even first looking at the bike.
More often, I've had issues with what I think are flaky sellers. I can't count the amount of times I sent emails to sellers who never respond. Of course, maybe the emails get caught up in their spam filters.