those things must be very old, bottom of the line or a differnt set with the rainbow name on them. check with justin he can get you rainbows and they will have warranty and atleast you know what your getting.
Looks good to me. They are the SLC line, which are the very bottom of the line Rainbow, their entry level components. They retail for $260 (dealer cost is half that). Good deal if you get them cheap. Definetely wouldn't call them hard to find, since they are still in production.