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So he gets a throwaway phone number. He calls the bidder up, telling some sad story about how he wants to go to the game with his son, and would offer a ton of cash for the tickets. The bidder then contacts the guy and tells him the deal is still on. Guy collects cash.
The big time win was when the bidder then tries to pawn the tickets off for more money. The guy reveals himself and tells the bidder to get bent. Bamm. This is actually an age old scam technique. In this situation, I believe the ends justified the means. Check out the full story using the link above.