I have one that I actually bought off ebay and got it for $100.
It was in great shape, other then a few scratches. Just make sure theres no bends or kinks in them and that they come with hardware or atleast the hanger brackets.
It's a tough skid and took a beating this past summer, since I do alot of rock crawling.
If you can find a used one, check ebay and jeepforum.com classifieds. I think there was one or two listed there the other day.