I don't consider something like this to be piracy. I know it is, but here's my feelings:

If something is not made available to purchase to the public, then it's open season. Clearly, neither the band or record label intends to make money off of certain things.

Like with movies - Downloading a movie in theatres or available on home video = Piracy. Downloading a movie not in theatres, not available on home video, or hasn't been released on home video in years and therefore is impossible to get = Not piracy.

If labels or studios want to make something available for me to purchase, and I want it, then by all means, I'll purchase it. If they want to be pricks and either not make it available or nearly impossible to get, screw 'em.