To help keep the re-sale marketplace safe for our fans, you can now purchase tickets through Ticketmaster Verified Exchange. The tickets you see here were originally purchased by other Bonnaroo fans who can no longer attend, and they determine the prices you see. While prices vary, fans will often list them at lower costs if you keep an eye out (though the lower priced tickets get snatched up quickly, so be vigilant).
You can also use the Ticketmaster Verified Exchange site to sell tickets if you can no longer attend Bonnaroo.