Sneakerhead data. Know more, camp less

I saw @darrenrovell tweet about them ( and thought it was a fascinating idea. They are the Kelly Blue Book for sneakers. Any sneakerheads out there that want to share their thoughts?
This is so awesome- but it is staggering to see the markup on the secondary market.
You can tell these guys are incredibly detailed and passionate. Love deep resources like this. Ride the sneakerhead wave!