So today I decided to go on tf2outpost and one of the first things I saw was a new minigun being sold for about 2 ref. I decided to see what the new weapon was and possibly see why it was so valuable and it turned out that a group of items were released yesterday as promotion for Watch Dogs and they are being sold for almost 20 times what they should be. So yeah has this ever happened before in TF2 (I've only been playing since last year).