Yep, CL is your friend here. I searched on CL for a good long time (off and on for 3-4 years) before finding what I wanted. To be fair, I would go through stages of varying commitment so it won't really take you that long but if you're looking for a good deal, act fast when you see something you like (the tandem I bought was up for 3 hours before I bought it and the seller said he had three other phone calls on it in that time).