Simple solution guys. If this bothers you so much and you don't think any real action is going to be taken, set up a fake e-bay account and place a $500 bid on the thing. Get a few friends to do different bids and then just don't pay. What's he gonna do? Report you to the authorities for not buying a mix that is not authorized to be sold? If he does, explanation is simple enough. You found out that he was selling something against the artist's wishes.