You can ignore the whole grading thing, yes its used in japan but the specific grades mean vastly different things depending on what auction it came from, so realistically just base your inspection and decision on the state of the car now, the condition of it, how it drives, how it feels, how it sounds etc, a previous grade from like ages ago has no relevance to how the car is now, plus as i said, it could mean many different things. for those reasons, you need to go with someone who knows what they're looking for. either someone who knows glanza's very well (and as such will know what they should feel like) or an experienced individual who can check the car over generally to make sure its good. where are you located? there might be someone on here that can help if you're local.