When I was younger I always bought them. Not to save money, but because the bands I listened to at the time tended to be pretty hit or miss. With a best of compilation I knew I would get the good songs, and none of the stinkers. Mind you, this was in the eighties, the decade of one-hit wonders. As I got older, I started listening to better bands. I hardly ever buy "Best Of " collections any more, I would rather listen to all the music of my favorite artists.