I've been trying to figure out why you would be interested in this disc ?
Ok, its a Ridge, which is arguably the most popular Vibram disc, I'll concede that, but, the Super Firms weren't anything special as far as colors.
This was not the first hot stamped Vibram, so there's no value there.
It is one of the rarest discs Vibram has ever made, I believe the only discs Vibram has ever made fewer of was the Christmas Ridge.
7/10 to me means you want a thrower, but why ?
The Super Firms have more plastic than any other Vibram ever made, which means they damage easily, some even came out of the mold with blems.
They will beat in faster than any other Vibram formula, which means an SF Ridge will become a hyzerflip only disc, less stable than a Summit, if you throw it regularly.
Plus, if you lost it you would never find another to replace it.
If you're still not deterred, I know Dana V. grabbed a fresh one off of Ebay last year, probably the last one still not in a collectors hand, and its a sweet plum purple color.
He has more than one, and I doubt he's crazy enough to still throw them, so if you sweet talk him, maybe he will come off of it, but be prepared for sticker shock, its gonna be like trying to buy prime Wagyu beef.