Just got back from Fairlawn, Ohio where I picked up Guitar Hero III (PS3) -$40 and Rockband for PS2 - $70. I wanted the PS3 version of Rock Band, but they were all sold out. That's just fine though, as I went to my local store, bought Rock Band for $30 used, and now for the price of $100, I got both the PS2 and PS3 version of Rockband. All of the PS2 instruments are the same as the PS3 instruments, so this is the best way to get the best deal. Thanks for posting this though, best deal ever!
As I was leaving the store, several of the associates walked over and laid copies in the back because they are going to purchase them later. Go ASAP, as the associates seem like they will buy most of the stock up, and the one girl at the counter had looked up Ebay prices to see if she could re-sell. I can't blame them though, these prices are nuts.