The usual extra charges on entertainment tickets in the U.S. are about 20 percent. I wanted to attend a Doc Watson concert at a university theater a while back, but the cost of tickets and fees and parking was too expensive. I skipped it, and so I missed my only chance to see him perform. Guess I should have bit the bullet and bought a ticket.
I've been spoiled by house concerts, which are usually $20 or less per ticket, with no fees or taxes - and no seats more than 20 feet from the performer.
-Joe-