"However, the reality is that there is no practical relief you could be granted, because you didn't suffer any loss in an economic sense."
I know why you would think that but its not really relevant. Assuming there are no special laws for a case like this, or a wavier of rights by the OP, when those speakers were won by Fse, the auction company had a legal obligation to sell the speakers to him. When he won the auction, a contract was created. Beyond that, nothing else matters. Just because there was no loss doesn't mean they could just walk away from the deal. Raks, in his post is correct. If the OP decided not to pay, the auction could come after him for the exact same reason; there was a contract.
I know why you would think that but its not really relevant. Assuming there are no special laws for a case like this, or a wavier of rights by the OP, when those speakers were won by Fse, the auction company had a legal obligation to sell the speakers to him. When he won the auction, a contract was created. Beyond that, nothing else matters. Just because there was no loss doesn't mean they could just walk away from the deal. Raks, in his post is correct. If the OP decided not to pay, the auction could come after him for the exact same reason; there was a contract.