> If you'd bought them for $10, you'd instantly turn around and sell them for a few thousand to someone else.
I expect there are plenty of people who would in fact, not do that.
At many income levels and budgets, gaining $1k from selling a ticket helps a lot less than losing $1k from buying a ticket hurts.
Plus many people aren't rational economic actors and would keep the $10 ticket and enjoy the show even if it doesn't make economic sense.
Do you realize you also need to pay for hotels and flights and food and etc? In such situations of course you'd sell them. People talk as if the ticket is even the problem and that it's cheap to go otherwise.