Jerry nailed it. Bands live or die on touring these days, so putting butts in seats is paramount. I agree that prices are higher than they used to be, but I also see concert prices as one of the more pure examples of supply and demand still around. If I see a ticket price that I consider to be ludicrously expensive, but the show still sells out, well, I guess it wasn't so expensive after all.
And I appreciate seeing some effort go into the production. If I want to hear the music, I have a better copy than anything I'll hear live sitting on my computer. But anyone who's ever seen GWAR or Skinny Puppy or Tool can attest that the theatrical elements add a whole new dimension of creativity for someone to put on a show.
Also, any complaint about ticket prices should start with Ticketmaster.
Kathy Griffin may not be everyone's comedic cup of tea, but I'm sure she's done her time in front of enough crappy brick walls in enough crappy basement comedy clubs for free that if she can sell out facilities at $80 a head, I say more power to her.
jg