I got mine from CL, and have been really happy with it. What worked well for me: I posted a "wanted" ad. Withing 24 hours, I had several responses. I spoke to every one who responded. the asking price range and the quality of what people were offering varied greatly. It was a good way for me to be in control of the situation, and have several options at once.
I've been using my trainer 3 or 4 times a week since I got it, doing some serious training sessions, and have been very happy with it.