Does anyone actually use priceonomics.com? I'm sorry, but I don't find the service useful at all. They come up with viral blog posts all the time, but the service is not actually something that I would use.
When I was looking to buy an Aeron chair, I used it to learn the range of market prices, and even was able to negotiate the seller down with the information from the site. I wouldn't have been able to get such a comprehensive view (in any reasonable amount of time) by just reading through CL. So yes it has been pretty useful to me.
