It's not obvious they sold for a higher price, they may have used them or never had them. But the real problem is proving an actual loss. There was a contract to exchange X tickets for Y money. Nothing changed hands, the buyer didn't lose anything, there aren't any damages to sue for.
Obviously they could try a cause of action for lost opportunity to profit from the transaction from legal standpoint, but it's much harder to claim losses from hypothetical things that never happened than to unwind an actual transaction.
What if Kobe was injured and the price of the tickets plummeted for example? It's a stretch to argue that the buyer lost something tangible by relying on the sellers performance of the contract.