I can't say that I disagree with the expensive instruments for Rock Band, but keep in mind that they could have made some really cheap piece of shit that broken in a few months, but overall, the instruments have been pretty well made. Especially with drums; it's easy to make shitty drums and you need something that will survive repeated hits with the drumsticks and feet. With the $190 price tag, you get basically a $50 game, $90 for drums, and $50 for guitar and mic ($35/15 probably). That's actually not bad.
At least with all of the stuff you buy, like the extra songs, etc., it carries over to other Rock Band games. That makes the price sting a bit less, and definitely carries replay value.
Rosalina: But you didn't.
Robert: But I DON'T.
Rosalina: You sure that's right?
Robert: I was going to HAVE told you they'd come?
Rosalina: No.
Robert: The subjunctive?
Rosalina: That's not the subjunctive.
Robert: I don't think the syntax has been invented yet.
Rosalina: It would have had to have had been.
Robert: Had to have...had...been? That can't be right.