I've bought two albums that I can think of off the top of my head based on the cover art without ever hearing a single track. In high school, I saw Dio's Holy Diver LP in the new release stacks, and the artwork looked so sinister, I parted with my hard earned six bucks. I liked the music even more than the cover, and my mom freaked out on the imagery. The second CD I ever bought was Queensryche's Operation: Mindcrime - I hadn't really heard any of their stuff, but I knew they were metal and the Orwellian album art intrigued me. I was blown away with the music inside.