[quote name='Psybuster']I think you can actually buy two copies of this for $6+tax at Gamestop (or better yet, this plus a 99 cent game for $4+tax), free shipping with SAVER if you buy two items at once.[/QUOTE]
FYI, The one at GameStop is just "On Tour" (the first version), not "On Tour: Decades" (the sequel). There's also another sequel "On Tour: Modern Hits" and Band Hero, in regards to DS versions of Guitar Hero.