Make it a lottery. A toy example, instead of selling 10,000 tickets that sell for $1000 sell 500k “lottery” tickets for $20 each. A lucky 10,000 get to the concert. The artist/venue makes the same amount. Everyone gets a chance at seeing the artist for a reasonable price. Would work for very popular artists with young fans like T Swift. Lottery tickets would need to be non-transferable as well.