Thats actually mediocre compared to most main stream festivals.  This isn't some obscure indie fest for no-name bands.  Alot of the bands that are playing are big.  And there is a high demand for the tickets.  Coachella crap was charging that for 2 days.
Last year someone offered me 300$ for my ticket. 
EDIT - Im actually surprised it wasn't more since Daves there.  He usually charges more than half that to see him. 
