Hard to find Atlus game, I wouldn't wait if you really want it. I still haven't seen Nocturne for under 40 used.
I like the game, but I'm like 20 hours in, and quite frankly, it's getting BORING. Fighting the same enemy types over and over, and the CatacombsGraphics are amazing, as is the music. Plot's alright, voice acting is pretty horrible. But it just lacks that something that would propel it from good to great. I'd say 7.5 is dead on.