The St. Paul Pioneer Press has an article about the resale market for tickets here in Minnesota now that scalping is legal. The lessons learned so far? Not much: scalping is risky; some acts price their tickets "correctly" (i.e. they know the market and don't leave much potential for scalpers to earn a profit), other acts don't assess the market "correctly." Those that set their prices "too low" create opportunities for scalpers.
But we knew that already.