For back shit, well shit, if I'm interested in a band I'll pull a Trung and download their whole discography. Rock releases usually don't have much going for them, and when they do it's usually either lyrics or stupid hagiographic shit for reissues or remastered albums. I guess the pictures -- if there are any -- are an attraction.
I've said this a million times, but I love going to the record store with my buddy and with $100 burning a hole in my pocket, with no idea of what I'll be walking out with. There usually aren't too many duds.