If Nikke started selling old pass skins for a huge sum of gems, what would be a fair price to you and everyone else that has spent money on them before?

I've never bought anything in this game before, but I think being able to buy a year old pass skin for 120k gems is a fair enough price. You would be setting yourself back so hard and it would be a massive sacrifice to everything else that requires gems. That's the price of 400 rolls, exchanging a handful of SSRs and two gold tickets for a single skin.
With the amount of pass skins I'm interested in I would have a hard time saving up for just one of them considering we get limited, collab units, and anniversaries to save up for. I don't think I would even bother rerolling my dispatches at that point, either.