When IPCyberCrime found the person behind the sale, the investigator discovered that he was an employee at a retailer, who, with friends, had stolen the bundles to sell on Craigslist. The sellers were turned over to the store's loss prevention department.
That bust led to one of the prospective buyers, named Christian Del Amo, who was raising money on a forum to buy the bundle (allegedly) for the purpose of copying the game and selling the copies, along with other pirated games, on hard drives. IPCyberCrime turned that case over to the Miami-Dade Police Department, who arrested Del Amo.
Obviously, this demonstrates one reason (aside from the whole morality thing) why you shouldn't try to make a business of selling pirated games. Activision has enough money to hire a private investigator, and is not afraid to use it.