Metallica is here in October. I have been watching tickets and they're way too high right now. I always buy last minute and usually get a steal and once in a while settle for crappy but very cheap nosebleeds
Still, waiting a few hours before the concert on StubHub, etc you get aaaaamazing finds. I sent my sister to see Timberlake and made her wIt until 30 minutes before the show. She paid 1/3 what she would have paid for face, and 1/4 a week before.