Buying games used comes with its risks. Be happy you actually got an otherwise pristine copy!

PDF Manual:
Dragon_Warrior_7_(EN).pdf

Do go through with what Iceglow mentioned. I'd be interested to see how they respond.

Bonus - PDF Strategy Guide:
Part 1 - RapidShare: 1-CLICK Web hosting - Easy Filehosting
Part 2 - RapidShare: 1-CLICK Web hosting - Easy Filehosting