I saw Beatmania, I saw DDR, I saw Guitar Freaks...but no Pop'n Music!
Pop'n Music
Pop'n Music 2 (append disc)
Pop'n Music 3 (append disc)
Pop'n Music 4 (append disc)
Pop'n Music 5
Pop'n Music 6
I can't help you with prices...I'd say Pop'n 1 goes for around $20 and 5 & 6 go for $50-60.