When I was young (almost 14 years old) I found a deteriorated The Number of the Beast vinyl, when I saw the cover I felt an instantly craving inside to buy the album, even when I didn't know NOTHING about the band (here in Chile at the time there was ZERO magazines, radio stations, TV shows, etc... who promotes metal music)
Two days after that I collect the money and went to the store and bought the LP, it was very cheap and had a lot of scratchs on it..... the rest was history..... 15 years of metal head about now....
That was the first and the last time that I bought an album by his cover... The rest of Maiden albums I also bought them without hearing them, but I ordered on a record store I also never saw the cover before I had them on my hands (Imagine my surprise when I receive Somewhere in time!!!!!!!)