Thank you both for the helpful insight. I'll ask for more pictures and see what come of it. They want 20 bucks and I was thinking I'd offer 10 and make the drive with or without a better age determination.
I think anywhere in that price range would be fair at the moment as the black SJs aren't as hard to find. In all honesty though if I was gonna pick one up and the difference was only $10 I would probably pay it for NIB. If its use then an extra $10 is probably worth me not having to scrape it, clean it, derust it, and etc.