can you buy rock band 1 disc only?

i'm getting the rock band 2 bundle and was wondering if you could get the original game somewhere by itself... can you buy rock band 1 disc only?
ya probably. I've seen it at Gamestop,can you buy rock band 1 disc only?
last time I was at wal-mart I saw Rock Band 1 and Rock Band 2 disc only versions side by side. both were $60 which i thought was dumb.
Yes.