I'm hoping to pick up a set of these this coming weekend. My club is having a swap meet, and one of the guys did have extra sets for sale. If the price is right, I might pick up the chase cards, too.
I've resisted the urge to buy packs at the store. Just bought one so far.
I've gone on ebay and looked at the sketch cards. The artwork is great. If I could find one reasonably priced, I'd pick one up.